碳酸氢钠 pka:-I __ find my pen. _ you help me? - .Yes, I ---, I think it _ be in one of your pockets.

来源：百度文库编辑：高考问答时间：2024/07/08 11:11:40

填入情态动词

I can't find my pen.Can you help me? Yes,I can.I think it may be in one of your pockets.
PS:may be 意为可能\也许
can 表示能力，意为能够，can't 为不能够，可写为can not.

can't. can. could

can't. can. can. must

can't. Can(请求帮助). can. must(表猜测语气)

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碳酸氢钠 pka:-I ____ find my pen. _____ you help me? - .Yes, I ---, I think it ___ be in one of your pockets.