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I have had a computer since I went there 如果把since 和其后画上线是用when还是how long提问?

分类: 作业答案 • 2021-12-02 10:44:50

问题描述：

I have had a computer since I went there 如果把since 和其后画上线是用when还是how long提问?

答

How long 一般对现在完成时提问
when一般对一般过去时提问