中考英语if 引导的条件状语从句 课件(共20张PPT)

(共20张PPT)
If 引导的条件状语从句
If you miss my party,
you will be sorry.
从句
主句
If引导的条件状语表示主句动作发生的条件，If 释为 “如果”。
You will be sorry if you miss my party.
注意：主从句的顺序可以调换。
if :如果，引导条件状语从句
主句 从句 例句
一般将来时(will+do) 一般现在时 If he doesn’t work hard,
he will fail his exams.
祈使句 一般现在时 If you want to go, tell me.
情态动词+ 动原 一般现在时 If she arrives in time , she may come with us.
过去将来时would+do 一般过去时 If he didn't work hard, he would fail his exams.
(主将从现)
(主祈从现)
注意
主句时态
从句的时态
If 引导的从句是一个完整的句子，一定要有主语
if 引导的条件状语从句
如果你起床晚，你就会迟到。
2. if 和条件句位置灵活，可放在句首，也可直接放在主句后面。
若 if 条件句放句首，从句后面要加逗号，和主句隔开。
Print the text if you like it.
If you get up late, you will be late.
= If you like the text, print it.
If you want to turn on the recorder, press button A.
A
B
C
D
E
F
Press button A if you want to turn on the recorder.
II
pause
stop
play fast
play back
play
record
-- If you want to play，
If you want to play back,
If you want to record,
-- How do I play/ play back/ record/…
press the red button.
press the blue button.
/ in the library
keep quiet
read books/
If you want to read books in the library, keep quiet.
Join the sentences with “If”
your hands/ put up / answer the question
If you want to answer the question,
put up your hands.
If 引导的条件状语从句，
主句是祈使句，从句用一般现在时态。
“主祈从现”
Complete the sentences.
1. If you ____ (want) to listen to music, _____ (choose) a CD.
2. If you ___ (buy) a new camera, ____ (get) a good one.
3. If the light ___________ (not come) on, ____ (wait) for one minute.
4. If it ___________ (not work) , _____ (wait) a minute and then _____(try) again.
5. If you ________ (not know) how to use the camera, ____ (read) the instructions.
want
choose
buy
get
doesn’t come
wait
wait
doesn’t work
try
don’t know
read
If I have a robot, _________________________
_________________________
_________________________
I will ask it to clean my bedroom.
I will ask it to do homework for me.
If he plays computer games on weekdays, what will happen
be very tired in class; not get good grades; be sad; ...
If he plays computer games on weekdays,
______________________________________________________________________________________________________
he will not get good grades.
he will be very tired in class.
his parents will be sad.
I fought with my best friend.
If you fight with your best friend, you will….
What will you do if you have a lot of pocket money
If I have a lot of pocket money,
I will _____________________.
_____________________.
pocket money
help poor children
put the money in the piggy bank
....
If I do, I will ______________.
help poor children
1. I’m sure if he _____ (go) to the party, he _______ (have) a great time.
2. If the rain _____ (stop) tonight, we will go to the cinema.
3. I’ll buy a computer if I _____ (have) enough money.
4. You ________ (not get) nervous if you ___ (do ) enough exercise.
5. If she ___ (be) kind to me, I __________(not argue) with her.
6. If you work really hard, you ______ (be) famous and rich.
7. If you ____ (pay) more attention to that, he ________ (not get) injured.
goes
will have
stops
have
won’t get
do
is
won’t argue
will be
pay
won’t get
Complete the sentences.
If 引导的条件状语从句
If 引导的宾语从句
If 引导的条件状语从句中，if是个从属连词，引导的句子是主句动作发生的条件，一般与后面的句子用逗号隔开，译为：如果
If 引导的宾语从句就是在复合句中作宾语的名词性从句，通常放在主句谓语动词（及物动词）或介词之后，译为：是否
1. I don’t know if it ________(rain) tomorrow.
If it ______ (rain), we won’t have a picnic.
2. I want to know if he _________ (come) tomorrow. If he _______ (come), I ________ (give) him a call.
3. Please let us know if he _________ (arrive) tomorrow.
Please let us know if he _______ (arrive) tomorrow.
will rain
rains
will come
comes
will give
will arrive
arrives
Practice