They had built ten houses by the end of last year.(改为被动语态)
They had built ten houses by the end of last year.(改为被动语态)
英语人气:848 ℃时间:2019-11-06 12:23:48
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Ten houses had been built by them by the end of last year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那改成问句呢?Had they built ten houses by the end of last year?had提前就行原句中有already是不是就变否定句?不是啊,already只是一个程度副词,没有否定含义。
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