小升初英语专项练习:情态动词
一、
情态动词的定义:
情态动词有词义, 但它不能单独作谓语, 它必须和其他动词一起构成谓语。情态动词没有人称和数的变化;它的后面必须跟动词原形。
二、
情态动词的种类:
情态动词有 can (could), (would), need
may, must, have to, shall (should), will
等,这些是小学阶段需掌握的情态动词。
三、 情态动词的用法: 一、 can, (could
过去式)
1) 表示能力(体力、知识、技能) 。 box(体力)
Can you lift this heavy
Mary can speak three languages. (知识)
能)
2) 表示请求和允许。
Can you skate (技
Can I go now
Could \\Can you help me ---- Yes, of course.\\Certainly.\\ Sure. Could \\Can you tell me the way to the Zoo
3) 表示推测(惊讶、怀疑、不相信的态度) ,用于疑问句、否定句和
感叹句中。
Can this be true
This can’t be done by him. How can this
be true 二、 may
1) 表示请求和允许。否定回答时可用 can’t 或 mustn’t ,表示“不可以,禁止”。
---- May I smoke in this room ----
No, you mustn ’t. ----
Yes, you can.
---- May I take this book out of the room (No, you can ’t / mustn ’t)
用 May I... 征徇对方许可时比较正式和客气,而用 Can I... 在口语
中更常见。
2 )表示推测、可能性(不用于疑问句) 。
1.He may be very busy now. 2
.Your mother may not know the
truth.
3)用于祈使句,表示祝愿。
May you succeed!
三、 must, have to
1) must 表示必须、必要 , 带有命令强制口气;而 have to 表示不得
不,很勉 , 客 需要。 You must comein time. We must help
each other.
My sister is ill; my mother has to look after her. I had to work when I was your age.
注意:must 的否定形式 mustn’t表示禁止,意思是“不能,不 ”。
在回答由 must 引起的疑 句 ,如果是否定的,不能用
mustn’t
(禁止,不准),而用 needn’t, don ’t have to
(不必要)。 Yes, you
---- Must we hand in our exercise must.
books today ----
----
don’t have to / you needn
’t.
No, you
2) must 表示推 、可能性(只用于肯定的 述句) ,意思 “一定是, 必然??”。
1. You’re Tom’s good friend, best.
so you must know what he likes
2. Your mother must be waiting for you now. 四、 shall,
1) shall 用于第一人称,征求 方的意 。 What shall we do
this evening 2) shall
用于第二、三人称,表示说话人给对方的命令、警告、允
诺或威胁。
1. You shall fail if you don
’t work hard.(
警告 )
2. He shall have the book when I finish it.( 3. He shall be punished.(
威胁 )
允诺 )
五、 should 和 shouldn ’t表示 应该 劝告、建议。
I should help her because she is in trouble.
You should go to class right away. She shouldn ’t play computer games too much.
六、 will
(过去式 would) 1) 做助动词,表示一般将来时,将要。
He will be home at six. Bob will leave school next month. 2) 作为情态动词时表示“愿意”“意愿”“会”。
I will help you. I will never do that again. Will / Would you
pass me the ball, please
( 一) 根据所学情态动词,填写适当形式。
1) ________ you like to go fishing with me
2) ________ I go homenow No, you _________ stay You ________
take more exercise.
4) The clock ________ tell us the time. 5) ________ you tell me how to get to the Qingyun Park
6) My mother is ill. I _________ stay at home and look after her.
7) ________ you like some tea 8) Must I borrow the book
with my ID card No, you ________. 9) ________ I use your car Yes, you
________.
10) ________ we play football this afternoon ( 二) 按要求改写句子。
1. I can swim fast. I ________ ________ fast. ( 否定句2. You must return the books now. (一般疑问句) - _____ I the
books now - No, you ________.
)