i don't know when_____famous A.does he become B.he becomes C

i don't know when_____famous A.does he become B.he becomes C.did he become D.he become
答案是B还是D呢,太纠结,顺便问一下C中助动词为什么不能加,陈述语序不能加助动词吗?
I137507279 1年前 已收到1个回答 举报
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BeUrPet 幼苗

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B 根据选项的这种形式只能是he becomes或者he became

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C中助动词为什么不能加，陈述语序不能加助动词吗？

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要表达过去做过，直接用he became，不要在前面加did，否则就不是陈述语序了。陈述语序要加did的情况只有否定的时候。比如：I want to know why he didn't come.
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