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Lucy has been cleaning the house since came back home.has要不要改为had

分类: 作业答案 • 2021-12-20 02:57:07

问题描述：

Lucy has been cleaning the house since came back home.
has要不要改为had

答

不用，现在完成时+since+一般过去时

答

不需要~~

答

不需要因为是先回到家再打扫房子