It is about half an hour since he came here.请问一下后面为什么是过去式?

分类: 作业答案 • 2021-12-19 11:52:11

问题描述：

It is about half an hour since he came here.
请问一下后面为什么是过去式?

答

Since指"从过去某一个时刻起"后面必须加过去时

答

记住：since 后接的从句一定要用一般过去时.
加油!不明白再问!