如题所述
错误。改：
It is for three days that I haven't kept my room tidy and clean.追问
It is for three days that I haven't kept my room tidy and clean.追问
强调句前面只能用it was/is 不能用完成时吗
追答不可以。that 引导的完成时态从句中最好不用不能延续的动词，而且时间表达中必然有表示时间持续的介词for。这两点注意。
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第1个回答 2017-08-24
It has been three days since I have cleaned up my room.
或It is three days since I have cleaned up my room.追问
或It is three days since I have cleaned up my room.追问
强调句，，，怎么是since
追答since引导时间状语从句，不是强调句型。
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