They had built ten houses by the end of last year.(改为被动语态）

ziyue191 1年前已收到1个回答举报

rosy_lee 幼苗

共回答了20个问题采纳率：90% 举报

Ten houses had been built by them by the end of last yea

1年前追问

这是过去完成时态吗？

对，确切的说时过去完成时态的被动语态。

had后面不加not吗？

原句是肯定句，转换成被动语态后仍然是肯定句

ziyue191 举报

那改成问句呢？

举报 rosy_lee

Had they built ten houses by the end of last year? had提前就行

ziyue191 举报

原句中有already是不是就变否定句？

举报 rosy_lee

不是啊，already只是一个程度副词，没有否定含义。

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你能帮帮他们吗

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