通用版2022届高考英语二轮复习第二部分语法知识贯通专题九并列连词和状语从句课件（52张）

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专题九
并列连词和状语从句
【第二部分
语法知识贯通】
考点帮·必备知识通关
考点1
并列连词
考点2
状语从句
难点
状语从句的省略
考法帮·解题能力提升
考法1
考查并列连词
考法2
考查状语从句中的连词
考情解读
课标要求
1.掌握并列连词的基本用法。
2.了解九种状语从句的基本作用及用法等,熟知引导每一种状语从句的连词。
3.掌握状语从句中的时态、语态和省略的情况,并熟悉一些常考重点句型。
卷别
并列连词
状语从句
2020新高考Ⅰ(山东)
·37.or
全国卷
2020
Ⅲ·65.When/As
2019
Ⅱ·67.but
2018
5年考频
5年2考
5年1考
浙江卷
2021.1
·56.and
2020.7
2020.1
·65.and
2019.6
2018.11
·59.or
2018.6
2017.11
2017.6
5年考频
5年3考
5年0考
五年考情回顾
命题分析预测
1.高考对并列连词的考查主要体现在对句子之间关系和行文逻辑关系的理解上,常考查并列连词and,but,or等。
2.对状语从句的考查集中在时间、条件、让步等状语从句上。
考点1
并列连词
考点2
状语从句
难点
状语从句的省略
考点帮·必备知识通关
考点1
并列连词
并列连词用来连接两个或更多的单词、短语或分句。由并列连词连接的两个或两个以上分句的句子叫并列句。不同的并列连词有不同的意义,也体现出各个分句之间不同的逻辑关系。具体如下:
知识1　表示并列、顺承或递进关系
　　表示并列、顺承或递进关系的并列连词有and,
both...and...,
as
well
as,
not
only...but
also...,
neither...nor...等。
?Their
car
broke
down
halfway
and
they
had
to
stay
in
a
small
inn
for
the
night.汽车半路抛锚了,他们只好在一家小旅馆过夜。　
?Not
only
did
he
speak
correctly,
but
also
he
spoke
easily.他不仅说得正确,而且说得轻松。
?I
have
neither
time
nor
money
for
the
ball.我既没有时间也没有钱参加舞会。
知识2　表示转折或对比关系
　　表示转折关系的并列连词有but和yet,表示对比的有
while和whereas。
?I
should
have
written
before,
but
I
was
ill.
我本该之前就写信的,但我生病了。
?Outgoing
persons
enjoy
surrounding
themselves
with
many
friends,
while/whereas
shy
persons
are
perhaps
content
with
fewer
but
closer
friendships.外向的人喜欢身边有很多朋友,而腼腆的人也许满足于更少但更亲密的朋友关系。
1
You
may
want
to
keep
a
calm
mood,
_______
you
should
never
stop
fighting
for
yourselves!?
解析
句意:你们也许想保持平和的心情,但是绝不应该停止为自己奋斗!根据句意可知,此处表示转折,故填but或yet。
知识3　表示选择关系
　　表示选择关系的并列连词有or,
or
else,
either...or...,
not...but...等。
?Shall
we
go
to
the
cinema
or
stay
at
home?我们是去看电影还是待在家里?
?I
have
two
tickets.
Either
you
or
your
brother
can
go
with
me.
我有两张票,你或者你弟弟可以和我一起去。
?The
meal
is
not
for
one,
but
for
many
to
enjoy.
这顿饭不是给一个人,而是给许多人享用的。
特别提醒　在"祈使句+and/or+陈述句"结构中,and表示顺承,or表示
"否则"。
"祈使句+and+陈述句"有时可用"名词(词组)+and+陈述句"表示,名词词组中常含有more,
another,
further,
earlier等词。
?Work
hard,
and
you
will
succeed.
努力工作,你就会成功。
?Hurry
up,
or
we'll
be
late
for
school.
快点,否则我们上学会迟到的。
?One
more
hour,
and
I'll
get
the
work
finished.再多一个小时,我就能把工作完成。
2
[2021安徽合肥调研性检测,62]Dive
down
650
feet,
_______　　　　you
will
notice
that
light
starts
fading
rapidly.
?
解析
此处表示潜到650英尺深的时候,你会注意到光开始迅速变暗。此处表示顺承,故用and,构成"祈使句+and+陈述句"结构。
知识4　表示因果关系
　　表示因果关系的并列连词有so和for。so表示结果,不能与because连用。for表示"由于",引出的分句用逗号与前句隔开,表示补充说明,不可换为because。
?She
was
not
feeling
very
well,
so
she
stayed
at
home
all
day.她觉得不太舒服,所以一整天都待在家里。
?It
broke
out,
for
the
birds
began
to
sing.
鸟开始叫了,天亮了。(for不能换为because。鸟开始叫不是天亮的原因。)
特别提醒　　　　　　when作并列连词时的常用句式
　　when也可作并列连词,意为"这时,那时",相当于and
at
this/that
time。常用于下列句式:
1.Sb.
was
doing
sth.
when…
?We
were
having
a
meeting
when
he
broke
in.
我们正在开会,这时他闯了进来。
2.Sb.
was
about
to
do/on
the
point
of
doing
sth.
when…
?I
was
about
to
go
out
when
the
telephone
rang.
我正要出门,这时电话响了。
3.Sb.
had
just
done
sth.
when…
?I
had
just
left
when
it
began
to
rain.
我刚离开,天就开始下雨了。
　　状语从句在句中作状语。状语从句位于主句之前时,常用逗号隔开;位于主句之后时,一般不用逗号。状语从句按其意义和作用可分为时间、地点、原因、目的、结果、条件、方式、比较和让步等状语从句。
知识1　时间状语从句
1.when,
as与while引导的时间状语从句的区别
考点1
并列连词
考点2
状语从句
连词
用法
从句谓语动词
when
从句的动作和主句的动作可以同时发生,也可以先后发生。when可指时间点,也可指时间段。
延续性动词或非延续性动词
续表
?When
I
opened
the
door,
I
found
everything
was
gone.我打开门时,发现所有东西都没了。
?Please
don't
speak
so
loud
while/when
others
are
working.别人在工作时,请别那么大声讲话。
连词
用法
从句谓语动词
while
从句的动作与主句的动作同时发生,表示持续性的动作或状态。
延续性动词
as
强调主从句动作同时发生,可译为
"一边……一边……,随着"。
延续性动词或非延续性动词
?He
hurried
home,
looking
behind
as
he
walked.他匆匆忙忙回家去,一边走一边回头望。
3
_______
she
picked
up
the
cellphone
after
dinner
to
continue
with
the
game,
she
started
to
feel
that
something
was
wrong
with
her
right
eye.?
解析
句意:她吃过晚饭拿起手机继续玩游戏时,开始觉得自己的右眼出了问题。根据句意可知,空处应用When引导时间状语从句,表示"当……的时候"。故填When。
2.表示"一……就……"的连词引导的时间状语从句
连词
例句
as
soon
as
As
soon
as
he
arrives,
we'll
start
to
work.他一到,我们就开始工作。
"the+名词"类:
the
moment
the
instant
the
minute
the
second
The
moment
I
saw
him,
I
recognized
him.我一看见他,就认出了他。
We'll
set
out
the
minute
you
are
ready.你一准备好,我们就出发。
immediately
directly
Directly
he
appeared
there
was
dead
silence.他一出现便一片沉寂。
The
boy
burst
into
tears
immediately
he
saw
his
mother.这个男孩一见到妈妈便放声大哭。
拓展延伸　　　　　表示"一……就……"的其他结构
(1)"hardly/scarcely...when..."和"no
sooner...than..."注意:这两个结构中,when/than前的主句通常用过去完成时,when/than引导的从句通常用一般过去时。当hardly/scarcely和no
sooner提至句首时,它们所在的主句要部分倒装。
?I
had
hardly/scarcely
got
home(=Hardly/Scarcely
had
I
got
home)
when
it
began
to
rain.我一到家,天就开始下雨了。?
?No
sooner
had
we
arrived
at
the
station
than
the
train
left.我们刚到站火车就开了。
(2)"on+动词-ing"和"on+one'
s+名词"
当动词-ing和名词在意义上相对应时,这两个结构可以互换。
?On
his
arrival(=On
arriving)
in
Paris
he
was
recognized
as
a
noble
and
thrown
into
prison.他刚到巴黎,就被认出是位贵族并被投入监狱。?
3.till,
until和not…until引导的时间状语从句
(1)"延续性动词(肯定式)+until/till"表示"动作延续到……为止"。
?We
walked
along
the
river
until/till
it
was
dark.我们沿着河散步,一直到天黑。
(2)"非延续性动词(否定式)+until/till"表示"直到……才……"。
?He
didn'
t
know
anything
about
it
until/till
I
told
him.直到我告诉他,他才知道这件事。
(3)强调句型"It
is
not
until…that…"。
?It
was
not
until
the
professor
came
that
we
began
the
experiment.直到教授来了,我们才开始做实验。
特别提醒
1.till不可以置于句首,而until可以。
?Until
you
told
me
I
had
no
idea
of
it.直到你告诉我,我才知道这件事。
2.not
until置于句首时,主句要部分倒装(从句不倒装)。
?Not
until
the
film
began
did
she
arrive.直到电影开始她才到。
4
[2021天津八校联考,23]According
to
the
report,
this
virus
was
never
known
_______
it
was
accidentally
found
by
a
doctor.?
解析
句意:据报道,这种病毒直到被一位医生意外发现才为人所知。根据句子结构及语境可知,此处表示"直到……",故用till或until引导时间状语从句。
4.before
和since引导的时间状语从句
(1)before引导时间状语从句时词义非常灵活。
?Please
make
sure
you
return
the
book
before
it'
s
due.请确保在到期之前将书归还。(在……之前)
Some
time
passed
before
we
got
used
to
each
other.我们相处了
一段时间才习惯彼此。(到……为止;到……之前)
?Someone
called
me
up
in
the
midnight,
but
he
hung
up
before
I
could
answer
the
phone.有人半夜给我打电话,但我还没来得及接就挂断了。(还没来得及……就……)
5
Think
first
_______
you
lose
patience
with
someone
you
love.?
解析
句意:在你对所爱之人失去耐心之前先想一想。结合语境可知,此处用连词before(在……之前)引导时间状语从句。故填before。
(2)since引导时间状语从句时表示"自……以来",从句一般表示动作的起点(谓语用非延续性动词),通常用一般过去时;主句表示动作的延续情况,用现在完成时。
?Since
he
graduated
from
college,
he
has
worked
in
this
city.自大学毕业以来,他就在这座城市工作。
特别提醒　　　　
　since从句的用法
since从句若用延续性动词,则表示主句的动作或状态始于从句动作或状态的结束,即表示"不做某事"。
?Three
years
has
passed
since
I
smoked.我戒烟已经三年了。
(3)"It+be+时间段+since/before…"句型(详见代词难点2"it构成的几个易混淆的句型")
5.by
the
time,
each/every
time,
next
time,
the
last
time,
any
time,
whenever引导的时间状语从句
?Each/Every
time
I
was
in
trouble,
he
would
come
to
my
help.每当我处于困境,他就会来帮助我。
The
last
time
she
saw
James,
he
was
lying
in
bed.上次她看见詹姆斯的时候,他正躺在床上。
知识2　地点状语从句
1.地点状语从句可用where,
wherever等引导。从句可放在主句之前,也可放在主句之后。
?They
are
planting
trees
where
there
is
plenty
of
water
and
sunlight.他们正在水和阳光充足的地方植树。
?Where
there
is
smoke,
there
is
fire.无火不生烟。/无风不起浪。
2.区分where引导的状语从句与定语从句
where引导状语从句时,其前没有先行词,从句用来说明主句谓语动作发生的地点;where引导定语从句时,其前有表示地点的名词作先行词,从句修饰先行词。
特别提醒　wherever/whenever既可以引导地点/时间状语从句,也可以引导让步状语从句。
?Wherever
you
go,
I'
ll
follow.不管你去哪儿,我都跟随。(让步状语从句)
?You
can
go
wherever
you
like.你可以想去哪儿就去哪儿。(地点状语从句)
知识3　条件状语从句
1.if和unless引导的条件状语从句。if意为"如果";unless(=if...not)意为
"如果不,除非"。
?The
volleyball
match
will
be
put
off
if
it
rains
tomorrow.如果明天下雨,排球比赛将会推迟。
?I
may
not
go
there
unless
I
can
complete
the
project
ahead
of
time.除非我能提前完成那个项目,否则我可能去不了那里。
6　_______we
make
good
use
of
public
transport,
the
environment
will
be
better.?
解析
句意:如果我们好好利用公共交通,环境将会更好。根据语境可知这里表示"如果",应填连词If。
2.in
case,
on
condition
that,
providing/provided(that),
supposing
(that)等引导条件状语从句。它们意思相近,意为"如果/万一,
假如,在……条件下"。
?In
case
there
is
a
fire,
what
will
we
do
first?如果发生火灾,我们首先做什么?
?Supposing(that)they
refuse
us,
who
else
can
we
turn
to
for
help?假如他们拒绝了我们,我们还能求助于谁?
?They
agreed
to
lend
us
the
car
on
condition
that
we
returned
it
before
the
weekend.他们同意把车借给我们,条件是我们在周末前归还。
3.as
long
as
(=
so
long
as)引导条件状语从句,意为"只要",语气强烈。
?I
don'
t
mind
where
you
go
as
long
as
you'
re
back
before
midnight.只要你在午夜之前回来,我不介意你去哪里。
4.if
only(如果……就好了)和only
if
(只有)引导条件状语从句。if
only引导的从句要用虚拟语气,时态要做相应变化;当only
if置于句首时,主句要部分倒装。
?If
only
I
had
a
dog,I
wouldn'
t
be
so
lonely.我要是有一条狗,就不会这么孤单了。
?Only
if
the
teacher
has
given
permission
are
students
allowed
to
leave
the
classroom.学生只有得到老师的许可才能离开教室。
知识4　让步状语从句
1.although/though引导让步状语从句。从句不能与but连用,若要强调前后两部分的对比意义,可与yet或still连用。
?Although/Though
he
has
a
lot
of
money,
yet/still
he
is
unhappy.他虽然有很多钱,但并不幸福。
7　_______
scientists
have
learned
a
lot
about
the
universe,
there
is
much
we
still
don'
t
know.?
解析
句意:尽管科学家们对宇宙已经了解颇多,但是我们仍然有很多未知之事。由句意可知,此处应用引导让步状语从句的词。故填Though/
Although/While。
特别提醒　while也可以引导让步状语从句,但从句一般放在主句前面,用逗号隔开。
?While
I
admit
his
good
points,
I
can
see
his
shortcomings.虽然我承认他的优点,但我还是能看到他的缺点。
2.as/though引导让步状语从句。as引导让步状语从句时,从句必须倒装。though引导让步状语从句时,从句可倒装也可不倒装,但有时为了强调,把所强调的内容置于though之前,构成倒装。
?Young
as/though
he
is,
he
can
read
and
write
in
several
foreign
languages.虽然他很年轻,但是他能用好几种外语读和写。
?Though
he
failed,
he
would
never
give
up.尽管他失败了,但他绝不会放弃。
特别提醒　as引导让步状语从句时,若从句是系表结构,且表语为可数名词单数,名词置于句首,其前不加冠词。
?Child
as
he
is,
he
has
a
good
command
of
English.尽管他是个孩子,但他精通英语。
3.even
though/even
if(即使)引导让步状语从句。
?Even
though/Even
if
the
weather
is
awful,
we
have
to
go
there.即使天气很差,我们也得去那里。
4."疑问词+-ever"引导让步状语从句时,相当于"no
matter+相应的疑问词"。
?He
keeps
taking
exercise
in
winter
no
matter
how(=however)
cold
it
is.不管天气有多冷,他都坚持在冬天锻炼。?
?Whatever(=No
matter
what)
we
do,
we
should
do
our
best.不管做什么工作,我们都应尽全力。
【注意】"疑问词+-ever"类的词既可引导让步状语从句,也可引导名词性从句;"no
matter+疑问词"只能引导让步状语从句。
?Whoever
breaks
the
law
deserves
a
fine.
违反该法律者予以罚款。(Whoever引导主语从句,此时Whoever不可换为No
matter
who)?
5.whether…or…(不管……还是……)引导让步状语从句。
?Whether
she
comes
here
or
we
go
there,
the
topic
of
the
discussion
will
remain
unchanged.不管她来这儿还是我们去那儿,讨论的话题都会保持不变。
8
A
pair
of
red
shoes
—
_______
they
are
for
sports,
dances
or
just
fashion
—
is
a
must-have
for
every
Chinese
woman's
shoe
collection.
解析
句意:一双红色的鞋子,不管是为了运动、跳舞,还是仅仅为了时尚,是每一位中国女性鞋子收藏中的必备品。根据句意及句子结构可知,此处应用whether...or...引导让步状语从句,故填whether。
知识5　原因状语从句
1.引导原因状语从句的连词主要有:because,
as,
since,
now
that。具体用法如下:
?He
didn't
attend
classes
yesterday
because
he
was
ill.因为他病了,所以他昨天没有来上课。
?I
can't
go
with
you,
as
I
have
a
lot
of
work
to
do.我不能和你一起去,因为我有很多工作要做。
连词
位置
内涵
语气
能否回答why
能否被强调
because(因为)
主句前或后
直接因果关系
强
能
能
as(由于)
主句前或后
双方都知道的原因
稍弱
不能
不能
since/now
that(既然)
通常位于主句前
?Now
that/Since
everyone
is
here,
we
can
begin
our
discussion.既然大家都在这儿,我们可以开始讨论了。
9
[2021江苏启东期中,63]At
that
time
I
hated
music,
just
_______
it
was
what
they
wanted
me
to
do.?
解析
句意:那时我讨厌音乐,只是因为那是他们想让我做的。分析句子结构及语境可知,此处表原因,应用连词because。
2.when(既然),
in
that(因为)等也可以引导原因状语从句。
?It
was
foolish
of
you
to
take
a
taxi
when
you
could
walk
there
in
five
minutes.
既然步行5分钟就能到那里,你却傻傻地乘出租车。
?It
can
be
counted
as
a
success
in
that
it
has
built
up
substantial
sales.
这可以算作一次成功之举,因为它使销量大大增加了。
知识6　目的状语从句
　　引导目的状语从句的连词有:so
that,
in
order
that,
for
fear
that,
in
case等。
1.so
that与in
order
that表示"为了,以便"。
其引导的目的状语从句常与情态动词can,
could,
may,
might等连用。in
order
that引导的从句可以置于主句之前或之后,而so
that引导的从句只能置于主句之后。
?I
am
studying
hard
so
that/in
order
that
I
can
go
to
a
famous
university.为了能上一所名牌大学,我正努力学习。
?In
order
that
we
could
save
time
we
used
the
computer.我们使用计算机是为了能节省时间。(In
order
that不可换用So
that)
2.for
fear
that
表示"生怕/以免",in
case表示"以防"。
?He
worked
hard
for
fear
that
he
might
be
fired
by
the
boss.他拼命干活以免被老板解雇。
?You'
d
better
take
the
keys
in
case
I'm
out.你最好带上钥匙,以防我不在家。
知识7　结果状语从句
　　so...that...和such...that...引导结果状语从句,表示"如此……以至于……"。
1.结构形式
?There
was
so
little
food
at
home
that
we
had
to
go
out
to
buy
some.家里几乎没有食物了,我们只好出去买一些。
?Mike
is
such
an
honest
worker
(=so
honest
a
worker)
that
we
all
believe
him.
迈克是一个非常诚实的工人,我们都相信他。?
?He
made
such
rapid
progress
that
he
was
praised
by
his
teacher.他进步非常快,老师表扬了他。
巧学妙记　　　　区别so…that…和such…that…
名前such,形副so,that从句跟在后;
little特"小"用such,四个"多""少"要用so。
特别提醒　
当so...或such...置于句首时,主句要倒装。
?So
fast
did
he
walk
that
none
of
us
was
his
equal.他走得非常快,我们无人能跟得上。
2.so/such…that…与so/such…as…的区别
(1)so/such…that…引导结果状语从句,that在从句中不作任何成分,只起连接作用。
?It
is
such
a
moving
film
that
we
all
want
to
see
it.这是一部非常感人的电影,我们都想看。
(2)在so/such…as…中,as引导定语从句,as在从句中作主语或宾语等。
?It
is
such
a
moving
film
as
we
all
want
to
see.这是一部非常感人的、我们都想看的电影。
10
[2020山东济南针对性训练,37]The
Chinese
have
such
a
close
relationship
with
tea
_______
they
have
developed
an
entire
"Tea
Culture".?
解析
句意:中国人与茶的关系如此密切,以至于形成了完整的"茶文化"。此处用such...that引导结果状语从句,故填that。
知识8　方式状语从句
1.as(照……方式)引导方式状语从句。
They
did
as
I
had
asked.他们是按照我的要求做的。
11
The
house
has
been
greatly
damaged
by
the
truck
and
we'd
better
leave
it
_______
it
is
until
the
police
arrive.?
解析
句意:卡车已严重破坏了这座房子,我们最好让它保持原样直到警察到来。as引导方式状语从句,意为"像……一样",leave
it
as
it
is意为
"让它保持原样"。故填as。
2.as
if/as
though引导方式状语从句。从句一般用虚拟语气,但如果从句所陈述的情况很可能实现,也可用陈述语气。
?He
likes
to
talk
big
as
if
he
were
an
important
person.他爱说大话,仿佛他是一位重要人物似的。(虚拟语气)
?He
walked
as
though
he
was
drunk.他走起路来就像喝醉了一样。(陈述语气)
知识9　比较状语从句
　比较状语从句常由as…as…,
than,
not
so…as…等引导。详见考点3
"形容词和副词的比较等级"部分。
在时间、让步、方式、地点、条件状语从句中,为了使语言更加简洁、生动,经常使用省略形式。
?While
(I
was)
in
Beijing,
I
paid
a
visit
to
the
Summer
Palace.在北京时,我参观了颐和园。(时间状语从句,连词+介宾短语)
难点
状语从句的省略
?Though
(it
is)
cold,
he
still
wore
a
shirt.虽然天气冷,但他仍然穿一件衬衫。(让步状语从句,连词+形容词)
?He
is
running
here
and
there
as
if
(he
is)
looking
for
something
lost.他在到处跑仿佛在寻找丢的什么东西一样。(方式状语从句,连词+现在分词)
?Put
a
comma
where
(it
is)
needed.在需要的地方加一个逗号。(地点状语从句,连词+过去分词)
?Unless
(it
is)necessary,
you'd
better
not
refer
to
the
dictionary.如果没有必要,你最好不要查词典。(条件状语从句,连词+形容词)
12
It
is
so
cold
that
you
can't
go
outside
_______
fully
covered
in
thick
clothes.?
解析
句意:天太冷了,除非你严严实实地裹上厚衣服,否则你不能去外面。根据句意可知,空处应填unless"除非",此处为条件状语从句的省略,将其补充完整为:unless
you
are
fully
covered
in
thick
clothes。故填unless。
特别提醒　
特殊的省略结构:if省略结构,常用作插入语。
if
so如果这样的话
　　　　　　if
not不然的话
if
necessary如果有必要的话
if
possible如果可能的话
if
any如果有的话
?If
necessary,
ring
me.
如有必要,给我打电话。
?If
possible,
let
me
know
beforehand.
如有可能,提前让我知道。
?There
are
few,
if
any,
mistakes
in
the
book.那本书里,如果有错误,也不多。
考法1
考查并列连词
考法2
考查状语从句中的连词
考法帮·解题能力提升
命题透视
高考中对并列连词的考查主要集中在"祈使句+and/or+陈述句"句式上。and表示顺承;or表示选择或"否则";so表示因果。
方法点拨　做考查并列连词的题目时,只有理清前后词语或分句之间的逻辑关系,恰当理解语境,方可轻松解题。另外,还要注意一些固定结构(both...and...,either...or...,not...but...等)和句式(祈使句+and/or+陈述句,sb.
was
doing
sth.
when...等)。
考法1
考查并列连词
13
[2019全国Ⅱ,67
]I
work
not
because
I
have
to,
_______
because
I
want
to.?
解析
句意:我工作不是因为我不得不工作,而是因为我想工作。此处考查固定结构not...but...,表示"不是……而是……"。故填but。
考法总结　
做此类题的关键在于分析空处前后之间的关系,有时也可根据固定结构来判断应该填哪个连词。
命题透视
高考中考查状语从句的题目较少,常考的是时间状语从句的引导词(when,while,as等)。同时,还应注意其他状语从句的引导词(where,if,unless,because,so/such...that,so
that,though/although等)。
方法点拨　
1.正确理解句意,判断主从句之间的关系,从而确定从句的类型。
2.筛选引导此类状语从句的连词,确定符合语境的连词。
3.熟练掌握as,since,while等可以引导多种状语从句的连词
考法2
考查状语从句中的连词
14
[2019天津,13
]Tom
is
so
independent
that
he
never
asks
his
parents'
opinion
_______
he
wants
their
support.?
解析
句意:汤姆很独立,他从来都不问他父母的意见,除非他需要他们的支持。分析句子结构并结合句意可知,应用unless(除非)引导条件状语从句,故填unless。