18. Michael今天不能来上学了,因为他伤到了他的右腿。 19. I couldn t play the piano when I was four and I still can t now.
20. basketball. 21. Six years ago, there was her eyes.(there be 过去时) 22. She couldn’t see anything. = She could see nothing.她什么都看不见了。
1. 2. 3. 4. 5. 6. 7. 8. 9. 1. 情态动词本身有各种意义,但不能单独做谓语,只能和动词一起构成谓语,表示说话人的语气和情感。没有人称和数的变化。 2. 情态动词can的用法 1>(表示有能力做或能够发生)能\会 I couldn t ride a bike at the age of 6 I ll do what I can to finish it on time 2>(表示知道如何做)懂得,会 She can speak English 3>(表示允许)可以 We can t wear jeans at work
情态动词can / could 的用法
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