在学习英语语法时，情态动词是非常重要的一个部分。它们能够帮助表达说话人的情感态度，例如可能性、能力、允许、请求等等。情态动词包括can, could, may, might, must, shall, should, will, would等。正确地使用情态动词可以让你的英语表达更加地道，同时也可以准确传达你的意思。
通过大量练习来掌握情态动词的用法，是提高英语水平的一个有效方法。本练习中，我们会通过填空题来检验和巩固你对情态动词的理解和运用。每个句子中都缺少一个情态动词，请根据括号中的提示来填写正确的情态动词。下面是两组练习，每组包含15个句子，希望对你有所帮助。
练习一：情态动词的基本用法
You *must* (obligation) finish your homework before going out.
She *can* (ability) speak four languages fluently.
I think you *should* (advice) see a doctor about that cough.
It *might* (possibility) rain later, so take an umbrella with you.
They *may* (permission) enter the competition if they meet the requirements.
You *must not* (prohibition) smoke in the non-smoking area.
*Could* (past ability) you play the piano when you were six years old?
We *will* (future intention) help you with your project tomorrow.
He *should not* (advice against) eat so much junk food. It’s bad for his health.
Visitors *may not* (prohibition) touch the exhibits in the museum.
You *would* (past habit) always tell stories about your travels, wouldn’t you?
They *might not* (possibility) be at home right now, try calling later.
*Could* (request) you please turn down the music?
I *must* (strong necessity) admit that I was wrong about the facts.
You *should* (expectation) have received the letter by now.
练习二：情态动词的复合使用
You *should have* (past advice) locked the door before leaving the house.
He *might be* (present possibility) waiting for us outside the cinema.
They *could have* (past possibility) won the game if they had played better.
We *will have to* (future obligation) discuss this issue with the manager.
I *wouldn’t have* (past contrary-to-fact) known about it if you hadn’t told me.
She *has to* (necessity) finish the report by tomorrow; there’s no other option.
The teacher said we *could* (permission in the past) use our books during the test.
I *must have* (conclusion) forgotten to send the email; I’ll do it right away.
You *can’t have* (negation of past possibility) seen him there; he was with me all day.
It *won’t* (negative future) be easy, but I am determined to try my best.
They *shouldn’t be* (negative expectation) too long; the store is just around the corner.
If he practiced more, he *could be* (potential result) a great musician.
By now, they *must have* (assumption) arrived at their destination.
You *would have* (past hypothetical) been more successful if you had taken the advice.
We *don’t have to* (absence of necessity) wear a suit to the event; it’s quite casual.
