资源简介

(共15张PPT)
Using Language
UNIT 1
Food for Thought
a ...I was able to hold a knife and fork—and chopsticks!
b But there are still some dishes that Dad dare not try even after many years
of marriage to my mother.
c ...Mum and I just have to find a way to get him into the kitchen!
d ...we’d better not eat too much roast food as it may make us suffer from
heat inside our bodies, ...
e “You needn’t try it if you don’t want to,” Mum said, ...
Grammar
Look at the sentences from the reading passage. Think and work out the meanings of the words underlined.
be afraid to do something
have the ability to do something
be necessary or give strong advice to do something
give advice to do or not to do something
not be necessary to do something
情态动词 (Modals)
情态动词本身具有一定意义，表达说话人的情绪、态度和语气，其特点是没有人称和数的变化（部分特殊），后面必须接动词原形。常用的情态动词包括can (could), may (might), shall (should), will (would), dare , need, must, had better, have to, ought to等。
本单元主要讲情态动词：
be able to, dare, have to, had better, need.
Grammar
be able to do sth. = have the ability to do sth.
be able to 后接动词原形，表示某人做某事的能力，可用于大多数时态。
be able to 用于过去时态时，可以表示 “某人过去或当时成功地做了某事”。
If I work harder, I will be able to make greater progress.
There was a big fire. Luckily, everyone was able to escape.
be able to与can
can be able to
只有现在式、过去式 各种形式
表示“自身具有的能力” 多指“后天努力所获得的能力；”“将来的能力(will be able to)”
could do sth. = had the ability to do sth. was/were able to do sth. = managed to do sth.
二者都表示“能力”，可以互换使用，但也有细微区别：
Grammar
dare not do sth. = be afraid to do sth.
dare 作情态动词时， 没有人称和数的变化，否定式是dare not，主要用于否定句、疑问句和条件从句中，一般不用在肯定句中。
dare 常用作实义动词，有时态、人称和数的变化。用在肯定句中，dare+带to的不定式；用在否定句和疑问句中，dare+带to/不带to的不定式。 dare to do
She dare not go out alone at night.
She doesn’t dare (to) go out alone at night.
Grammar
needn’t do sth. = not be necessary to do something
need 作情态动词时，用于否定句或疑问句中，在肯定句中一般用must, have to, ought to 或should代替。
need 作实义动词，有人称和数的变化；
sb. need (s) to do sth. 某人需要做某事
sth. need (s) doing/to be done 某事/物需要被……
You needn’t come so early.
He needs to earn more to support such a large family.
This shirt needs washing. = This shirt needs to be washed.
以need开头的一般疑问句，否定回答用_______,肯定回答用__________;
以must开头的一般疑问句，肯定回答用__________,否定回答用_____________________。
Thinking
needn’t
must
must
needn’t/don’t have to
Grammar
Grammar
have to 的含义与must相似，两者往往可以互换使用，但have to 有各种时态，且强调客观需要，意为 “不得不”。
否定形式是don’t have to，相当于needn’t。
have to = be necessary or give strong advice to do sth.
There were no buses; we had to walk all the way home.
You don’t have to/needn’t bring a gift if you don’t want to.
Grammar
had better 后接动词原形，意为“最好”， 用于现在或将来时，没有任何词形变化。构成疑问句时将had（而不是had better）置于主语前。 had better 的否定式是在其后加not，疑问式是把had和not 提前。
had better = give advice to do or not to do sth.
What had we better do 我们最好怎么办？
Hadn’t we better go now 我们是不是现在就去呢？
be able to 能够 有时态变化 will be able to
dare 敢 情态动词/实意动词 dare not
need 需要 无人称和数的变化 needn’t/don’t need to
have to 不得不 有时态变化 don’t have to
had better 最好做...... 无人称和数的变化 had better not do
选词填空
be able to, have to, had better, dare, need
(包括否定形式)
We _____________________ take any food to the party as Sue will get everything ready.
2. You _____________ go to school without breakfast; it’s bad for your health.
3. I don’t want to attend the meeting, but I ________, as it’s required by the
director.
4. Afraid of water, I wonder if I ______ jump into the pool and swim.
5. Finally I ____________ persuade my cousin to give up the plan.
was able to
dare
have to
had better not
needn’t/don’t have to
Grammar
have to
dare not
had better
needn’t
be able to
Complete the tips for good table manners with the correct forms of modals in Activity 1. (Page 5)
Part Two
Comprehension
Comprehension
large, round
tiny, fresh
fishy
stinky
fragrant
spicy, fruity果香味浓的
bitter, sweet
sour, hot
tasty, delicious
tender, soft
yummy …
creamy, smooth
hard
crispy…
juicy, cold
burnt
colorful
smelly
…

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