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IhavebeeninshengzhouIwassevenyearsold.A.sinceB.when
题目详情
I have been in shengzhou ___I was seven years old.
A.since B.when
A.since B.when
▼优质解答
答案和解析
选A,since
因为本句主句是现在完成时结构“have been”,所以只能用since,注意since的用法：
现在完成时 + since +过去时
因为本句主句是现在完成时结构“have been”,所以只能用since,注意since的用法：
现在完成时 + since +过去时
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