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for a while? 我可以用會(huì)兒你的鋼筆嗎? 5) could( can的過(guò)去式) 能,會(huì) 。 可能 He could not ride a bike two years ago. Could you help me?(在此 could語(yǔ)氣更加委婉) It could be a bear or a wolf. 6) can’t 不能; 不可能(表可能性) The boy can’t answer the question. The man in the room can’t be Tom, because Tom has gone to Shanghai. 4a. Choose the best way to plete each sentence using the words in brackets 1. A: Where’s Jean? B: I’m not sure. She (is / might be / must be) in the laboratory. 2. A: Everyone is going to the pool after school. B: Really? It __________(must be / can’t be / could be) hot outdoors. 3. A: That’s the phone. B: Hmm. I wonder who it _________(must be / could be / should be). 4. A: I wonder if these are Jim’s glasses. B: They_________ (can’t be / might be / could be) his. He doesn’t wear glasses. 5. A: I