Unit 6 TV programmes Grammar： Using if & unless 课件34张

九年级英语上册 牛津译林版
课件
Unit 6 TV programmes
Grammar
Unit 6 TV programmes
Grammar
教学目标
Teaching aims and learning objectives
By the end of the lesson, students should be able to:
1.learn to use if-clause;
2.learn to use unless-clause；
3.learn to use “主将从现” 原则。
if 可以用来引导条件状语从句，此时，if 通常表示“假如”。
Using if
If you are happy,what will you do?
Free Talk
If You Are Happy
If you are happy and you know it ,
clap your hands.(主句)
If you are happy and you know it ,
stomp your feet.(主句)
If you are happy and you know it,
shout horray.(主句)
If you are happy and you know it,
do all three.(主句)
1.如果主句是祈使句，if从句通常用一般现在时。
e.g.
Please?call?me?if?he_______ (come) next?Sunday.
如果他下周日过来请打电话给我。

Don't play computer games if you _________(not finish)
your homework.
如果你不完成作业就不要玩电脑游戏。
don’t finish
comes
祈使句
祈使句
We use if to talk about the result of a possible action. We make sentences with if like this:
If-clause（条件状语从句）
(simple present tense)
Main clause（主句）
(will/may/might/…+
infinitive)
1. If you are a football fan,
you will not want to miss this week’s programme.
2. If you are an animal-lover,
you may feel sad about it.
3. If you enjoy solving mysteries,
you might like this film.
从现
will/won't +do
从现
may+do
从现
might+do
2.如果主句含有will时，
从句通常用___________，主句用___________，
即“主将从现”原则。
e.g.If it doesn’t rain , I ________(go) for a picnic.
3.如果主句中含有may, can, might等情态动词时，
从句通常用____________。
e.g. If it ____(rain) tomorrow, we can't go running.
小结：在if引导的状语从句中，无论主句是用一般将来时、情态动词还是祈使句，if从句均用__________.

一般现在时
一般将来时
will go
一般现在时
rains
一般现在时
4.如果表示的是客观事实或普遍真理，从句和主句通常都用一般现在时。
e.g. If you heat ice, it melts.
如果你加热冰，它就会融化。
If I ____ (go, will go) to the Reading
Club this afternoon, I
______________ (do not have, may not
have) any time to watch TV.
2. If Simon _____ (gets, will get) home late,
he __________ (misses, will miss) his
favourite cartoon.
go
may not have
gets
will miss
A1. Millie is thinking about herself, her friends and TV programmes.
Complete the sentences with the correct forms of the verbs in brackets.
从现
从现(三单)
3. If Amy __________ (completes, will
complete) all her homework quickly,
she ___________ (watches, will watch)
the chat show.
completes
will watch
4. If Daniel ________ (takes, will take)
part in the game show, he _________
(wins, might win) a prize.
takes
might win
从现(三单)
从现(三单)
5. If Sandy _______ (finds, will find) a
programme interesting, she
_____________ (introduces, will
introduce) it to us.
finds
will introduce
从现(三单)
If-clause,
Main clause
Main clause
if-clause
If you are an animal- lover,
you will feel sad about it.
You will feel sad about it
if you are an animal- lover.
Work out the rule
comma(逗号)
Work out the rule!
We often use the simple __________
(future, present) tense in the if-clause.
We need a _________ (comma, full stop)
after the if-clause when it is the first part
of a sentence.
present
comma
一般现在时
逗号
Asking about animals
Millie watched a documentary about animals. Help Millie answer her father’s questions with the help of the words in the box.
Dad: What will a bear do if it’s in danger?
Millie: If a bear (1)____________, it (2)
___________ people.
Dad: What will a polar bear do if it’s
hungry?
Millie: If a polar bear (3)___________, it
(4)__________ fish from the water.
attack catch hunt live protect walk
is in danger
will attack
is hungry
will catch
vt./vi. 攻击，进攻
n. 北极熊
Dad: What will elephants do if they’re thirsty?
Millie: If elephants (5) _____________, they
(6) ___________ until they find a river.
Dad: What will tigers do if they live in the
wild?
Millie: Tigers (7) ___________ for their
own food if they(8) ______________.
are thirsty
will walk
will hunt
live in the wild
attack catch hunt live protect walk
---What will+主语+do +if+从句？
---If +从现，主将.
Dad: What will tigers do if they have babies?
Millie: Tigers (9) __________ as a family if
they (10) ____________.
Dad: What will male wolves do if there’s
danger?
Millie: Male wolves (11) ____________ their
families if there (12) ___________.
will live
have babies
will protect
is danger
attack catch hunt live protect walk
live as a family
按家庭方式生活
adj. 雄性的
--What will+主语+do +if+从句？
--主将+if+从现.
unless作连词，意为“如果不，除非”，在句中引导条件状语从句，相当于if ... not。与 if 一样，unless引导的条件状语从句常用一般现在时态表示将来。 unless 引导的从句既可以放在主句之前，也可以放在主句之后。当从句位于主句之前时，常用逗号与主句隔开。
e.g. He won’t come to the party unless
you invite him.
Using unless
Sometimes we can use if ... not 代替 unless.
如果主句是一般将来时态，则unless 引导的从句的时态通常用一般现在时。
e.g. The situation will continue unless humans
stop hunting them for their fur and bones.

→ The situation will continue if humans______(not) stop hunting them for their fur and
bones.
do not
e.g. Unless it rains tomorrow, we are
going to play football in the park.
→
If it _______(not) rain tomorrow, we are
going to play football in the park.
does not
The unless-clause can come first or after the main clause.
e.g. Unless you try your best, you will
not realize your dream.
You will be late unless you leave right
now.
在unless引导的条件状语从句中，主句
也可以含有情态动词或祈使句。
e.g. He can't see clearly unless he wears
glasses.
Don’t touch the machine unless the
teacher allows you to.
1. Unless the weather report says it is
going to rain, ______
2. We will arrive at the studio around
9:30 a.m., _______
c. you will not have to take an umbrella
with you.
d. unless the traffic is very heavy.
c
d
从现
从现
3. Unless you already know the studio
very well, ______
4. You will buy your lunch at the
restaurants in the studio, ______
a. unless you take your own food with
you.
f. you will travel around it with a tour
guide.
f
a
从现
从现
5. Unless you are tired, ______
6. You will have a chance to see how a TV
programme is recorded, ______
b
e
b. you will not need to take the minibus
in the studio.
e. unless you have little interest in it.
从现
从现
Work out the rule!
We use the simple _________ (future, present) tense in the unless-clause.
present
Let's summary!
★祈使句+if/unless +从句.
★If/ Unless+从句，主语+V.情态+do.
★主语+will+do +if/unless+从句
(主将从现）.
中考链接
( )1.If he_______ Guilin, he 'll probably go to Yangshuo.（2017年四市同城中考）
A. visits B. is visiting
C. will visit D. visited
( )2.I will go camping if it_______ this weekend.
（2017年贺州中考）
A .won't rain B .isn't rain
C.don't rain D.doesn't rain
A
D
( )3.---I don't know if Mr White ______to watch the football game with us next weekend.
---I think he will if he ______free.(2016北海中考)
A. will go ; is B. will go ; will be
C. goes, is D. goes; will be
( )4.Johnson won't answer the phone if he______
the number.(2017年广东中考)
A.knew B.doesn't know
C. will know D.didn't know
A
B
是否
如果
单项选择。
1. If?there?________?no?buying?and?selling
of?animals,?there?_______?no?killing?in
nature.?
A.?is;?will?be?????B.?will?be;?will?be????
C.?is;?is??????? D.?will?be;?is
A
Exercises
1. If he?　　　? hard, he will get good grades.
A. study??????????????? B. studies C. will study????????? D. studied
2. I want to know if Mary?　　　?to the party tomorrow.
A. go??????????????????? B. went C. will go????????????? D. goes
?3. Everyone must dress up. If you?　　　, they won’t let you in.
A. don’t??????????????? B. won’t C. can’t??????????????? D. mustn’t
4. Mary will go to Sanya if she?　　　?a five-day trip.
A. have???????????????? B. had C. will have?????????? D. has
5. If he comes late,?　　　?he will miss the train.
A. and?????????????????? B. so C. /?????????????????????? D. or
B
D
A
D
C
Level One
Memorize the new
words, expressions and patterns.
2. Preview Integrated skills.
Homework