Unit 10 If you go to the party, you'll have a great time 语法精析精练

中小学教育资源及组卷应用平台
八上Unit
10语法精析精练
语法精析
If引导的条件状语从句
一、引导条件状语从句最常用的连词是if,常见的if条件状语从句表示在某条件下,某事很可能发生,条件是可能存在的主句中某种情况发生的概率也是很高的。如:
If
you
ask
him,
he
will
help
you.
如果你请他帮忙,他会帮你的。
If
you
fail
in
the
exam,
you
will
let
him
down.
如果你考试不及格,你会让他失望的。
If
you
have
finished
the
homework,
you
can
go
home.
如果你作业做完了就可以回家了。
二、另外,if从句还表示不可实现的条件或根本不可能存在的条件,也就是一种虚拟的条件或假设。从句多用一般过去时或过去完成时,表示对现在或过去的一种假设。如
If
I
were
you,
I
would
invite
him
to
the
party.
如果我是你,我会邀请他参加聚会。
I
would
have
arrived
much
earlier
if
I
had
not
been
caught
in
the
traffic.要不是交通堵塞,我本会来得早一些。
三、另外你还要注意条件句的时态搭配
1.if从句用一般现在时,主句用一般将来时。如:
If
he
runs,
he'll
get
there
in
time.
如果他跑的话,他就会及时赶到那儿。
The
cat
will
scratch
you
if
you
pull
her
tail.
如果你拉猫的尾巴,它就会抓你。
2.f从句用一般现在时,主句用may/
might//can。如:
If
the
fog
gets
thicker,
the
plane
may/might
be
diverted.
如果雾再大一些,飞机可能就会改在别的机场降落。
If
it
stops
snowing,
we
can
go
out.
如果雪停了,我们就可以出去了。
3.if从句用一般现在时,主句用must/
should..如
If
you
want
to
be
healthy,
you
must/should
eat
less
junk
food.
如果你想身体健康,你必须少吃垃圾食品。
4.if从句用一般现在时,主句用一般现在时。如:
If
you
heat
ice,,
it
turns
to
water..(也可用
will
turn)
如果把冰加热,它就会化成水。
5.if从句用现在进行时,主句用一般将来时。如
If
you
are
looking
for
Peter,
you'll
find
him
upstairs.
如果你是在找彼得,上楼就会找到他。
6.if从句用现在完成时,主句用一般将来时。如
If
you
have
finished
dinner,
I'll
ask
the
waiter
for
the
bill.
如果你吃完了,我就叫服务生来算账。
注意:学习“引导的条件状语从句的用法,现在总结一下:
条件句不一般,几个要点记心间;
条件句,放在前,逗号要放句中间。
条件句表可能,主句多用将来时
条件句表事实,主句常用现在时。
在if引导的条件状语从句中,如果从句谈论的是一个有可能发生的事实及其产生的相关的结果,主句用一般将来时态,从句用一般现在时态。如
We
can
walk
there
if
we
can't
find
a
bus.
如果我们没有找到公交车,我们可以走路去那
If
it
rains
tomorrow,
we
will
not
go
to
the
zoo.
如果明天下雨,我们就不去动物园
What
will
you
do
if
you
find
a
panda
in
danger?
如果你发现一只熊猫处于危险中你会做什么?
如果f条件句谈论的是重复发生和预示要发生的情景和事件,则主从句大多用一般现在时态。如:
If
bears
are
in
danger,
they
attack
people.
如果熊处于危险中,他们会袭击人类
在if引导的条件状语从句中,f和条件句位置灵活,可直接放在主句后面,若迁条件句放句首,从句后面要加逗号,和主句隔开。还要注意前后时态一致原则。
语法精练
I单项选择。
(
)1.-Tom
wants
to
know
if
you
will
have
a
picnic
tomorrow.
-Yes.
But
if
it________we'll
play
chess
instead.
A.will
rain
B.rained
C.is
raining
D.rains
(
)2.
We
will
be
punished_______we
break
the
law.
A.until
B.if
C.unless
D.though
(
)3.I
enjoy
fresh
air
so
I
always
sleep
with
the
window
open________it
is
really
cold.
A.unless
B.when
C.if
D.since
(
)4.
Studying
in
groups
is
necessary_________
you
want
to
do
well
in
school.
A.if
B.until
C.unless
D.though
(
)5.
Everyone
must
dress
up.
If
you________,they
won't
let
you
in.
A.don't
B.won't
C.can't
D.mustn't
Ⅱ完成句子。
1.如果他到的晚了会发生什么事情?
What____________
__________if
he__________late?
2.如果努力学习,你就会取得好成绩。
If
you__________
__________,you__________
__________good
__________
3他如果看电视太多了,他的父母会不高兴。
If
he__________TV
too
much,
his
parents__________
__________unhappy.
4.如果我们为他组织生日聚会,大家都会来的。
Everyone__________
__________if
we__________a
birthday
party__________him.
5.如果明天不下雨,我会和你一起去公园的。
If
it__________
__________tomorrow,
I________go
to
the
park________you.
答案
语法精练
I.1-5
DBAAA
II.1.
will
happen;
arrives/is
2.
study
hard;
will
get;
grades
3.
watches;
will
be
4.
will
come;
organize;
for
5.doesn't
rain;
will;
with
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