the problem is difficult to be solved 为什么solve要是过去式
the problem is difficult to be solved 为什么solve要是过去式
英语人气:437 ℃时间:2020-04-28 17:24:31
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这里的solved是被动语态,因为前面有一个be.就像中文说的“问题被解决”是一样的.当被动语态时,be动词后跟的动词就要变成过去分词形式(那不是过去式)
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