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问题: 一道英语题,请详细分析,谢谢!

The little girl _______(lie) in bed for almost a month since _______ (fall) sick.

请详细填写并分析since在此句的用法,谢谢!

解答:

我觉得1、has lain;
2、fell;
"since"一般和完成时态连用,前面完成时态后面跟过去时!表示“自从...."
例如:I have lived in this small town for 15 years since I was a little girl.