题目内容
The light in his room is off.He ________ to sleep.
- A.may have gone
- B.can have gone
- C.could have gone
- D.must have gone
D
表示肯定的推测要用must have done sth.,只用于肯定句中;may have done意为“有可能做了某事”;can have done表示推测时,只用于疑问句和否定句中;could have done意为“有能力做某事却没做”。
表示肯定的推测要用must have done sth.,只用于肯定句中;may have done意为“有可能做了某事”;can have done表示推测时,只用于疑问句和否定句中;could have done意为“有能力做某事却没做”。
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