It is not until 为什么不能用when?

It is not until 为什么不能用when? It is/was not until...that从句,为什么从句不能用when引导 when will you return to china?答案是not until next week ,为什么不能用 It is not until midnight that he finished the report.为什么不填wh when we will visit the museum is not decided!为什么visit 不能用 一般 It is not until that It is not until ---did he---有这句子吗 是不是只能用that be careful not to get off the bus ()it stops.为什么填until?when. It will be three years ____we meet again .在这里为什么不能用until 儿要用 it is not until的用法 it is not until ...that...用法 it was not until when...与it was not until that...区别,强调句型用哪个.