仁爱八年级下册语法专项 条件状语从句课件（共13张）

(共13张PPT)
仁爱八年级下语法专项
条件状语从句
一、位置
请仔细观察下列例句，注意条件状语从句的位置，然后补全结论部分所缺的内容。
【例句】
1.
Tell
Jack
to
call
me
if
you
see
him.
=
If
you
see
Jack,
tell
him
to
call
me.
条件状语从句
2.
If
you
want
to
do
well
in
the
test,
you
should
work
hard.
=
You
should
work
hard
if
you
want
to
do
well
in
the
test.
【结论】
通过观察以上例句，我们可以看出：条件状语从句既可位于主句之前，也可位于主句之后。位于主句之__________时，常用逗号与主句隔开。
前
二、时态
请仔细观察下列例句，注意主句和从句谓语动词的时态，然后补全结论部分所缺的内容。
【例句】
1.
If
I
see
him,
I’ll
give
him
this
letter.
2.
If
it
rains
tomorrow,
we
won’t
go
to
the
museum.
3.
Please
call
me
if
you
come
back.
4.
You
can
ask
the
policeman
for
help
if
you’re
lost.
【结论】
通过观察以上例句，我们可以看出：当主句和从句都表示将要发生的动作或存在的状态时，主句用__________时，从句用__________时表将来。如果主句是祈使句或者主句的谓语部分含有情态动词，if引导的条件状语从句也常用一般现在时。
一般现在
一般将来
三、转换
请仔细观察下列例句,
然后补全结论部分所缺的内容。
【例句】
1.
Work
hard
and
you
will
pass
the
exam.
→If
you
work
hard,
you
will
pass
the
exam.
2.
Work
hard
or
you
won’t
pass
the
exam.
→If
you
don’t
work
hard,
you
won’t
pass
the
exam.
【结论】
通过观察以上例句，我们可以看出：
1.?“祈使句+
and
+陈述句”可转换为“if
引导的______条件句+陈述句(主句)”；
2.?“祈使句+
or
+陈述句”可转换为“if引导
的______条件句+陈述句(主句)”
肯定
否定
根据汉语意思完成英语句子，每空一词(含缩略形式)。
1.?如果你喜欢游泳,
你可以加入学校游泳队。
If
you
_______
___________,
you
________
________
the
school
swimming
team.
?like
swimming
?????
can?
join
2.?如果迈克需要这些书，他会告诉我的。
If
Mike
_______
_______
________,
he
________
________
me.?
3.?如果你想在晚上9点前完成家庭作业，就不要再看电视了。
Stop
_________
_________
if
you
_______
________
finish
your
homework
before
9:00
p.m.
needs
these
books
will
tell??
watching
TV
??
want
to
4.?如果明天我不忙，我就和你一起去购物。
If
________
________
busy
tomorrow,
I
________
________
with
you.
will
go
I’m
not
shopping
用
if
将下列句子合并为主从复合句。
1.
He
will
pass
the
Chinese
exam.
He
works
hard.??
?If
he
works
hard,
he
will
pass
the
Chinese
exam.
/
He
will
pass
the
Chinese
exam
if
he
works
hard.
2.
Eat
more
vegetables.
You
will
keep
healthy.
?
If
you
eat
more
vegetables,
you
will
keep
healthy.?
/
You
will
keep
healthy
if
you
eat
more
vegetables.
3.
She
can
arrive
there
on
time.
She
gets
up
early.?
If
she
gets
up
early,
she
can
arrive
there
on
time.
/
She
can
arrive
there
on
time
if
she
gets
up
early.
4.
They
will
have
a
picnic
tomorrow.
It
doesn’t
rain.?
If
it
doesn’t
rain,
they
will
have
a
picnic
tomorrow.
/
They
will
have
a
picnic
tomorrow
if
it
doesn’t
rain.
Thank
you！