《2025年通成学典课时作业本九年级英语上册人教版山西专版》

我们通常会用 must，might，could，can't 等情态动词表示推测。
1. must 表示较有把握的推测，即说话人对事情的推测把握比较大，意为“一定”，只用于肯定句中。
2. can't 表示否定的推测，意为“不可能”，即可能性几乎为零。
3. must 与can’t在语境中都有充分的猜测依据，对事实的认定几乎有 100%的把握。
4. may，might 和 could 对事实的猜测只是依据常理，猜测的准确度和把握性不大，意为“可能”。could 和 might 语气更委婉。

答案： 1. 一定 2. 不可能 3. can’t 4. 可能

一、根据汉语提示完成句子，每空一词
1. 这本书一定是海伦的，因为她的名字在封面上。
The book must be Helen’s because her name is on the cover.
2. 这支钢笔不可能是我的。我的新多了。
This pen can’t be mine. Mine is much newer.
3. 走了这么远的路，你一定饿了吧。
You must be hungry after all that walking.
4. 汤姆一定在他的房间里。他房间的灯亮着。
Tom must be in his room. The light in his room is on.
5. 昨天晚上他们看见空中有个东西。它有可能是一个不明飞行物。
They saw something in the sky last night. It could/might be a UFO.

答案： 1. must be Helen’s 2. can’t be mine 3. must be hungry 4. must be 5. could/might be

二、用方框中所给单词的适当形式填空(其中有一个多余)
laboratory coat outdoor big real glass
1. — Do you know the girl wearing a pair of glasses?
— Yes. She is my new friend, Mary.
2. — In my shop, there are many kinds of coats. You can choose one.
— OK, thanks a lot.
3. It is warm enough to be outdoors. So don't stay indoors all day.
4. — Is that a cat?
— Oh, I don't think it is a cat because it is much bigger.
5. — We are all planning to go to the restaurant to have a dinner.
— Really? The food there must be very delicious.

答案： 1. glasses 2. coats 3. outdoors 4. bigger 5. Really