什么时候用be动词和have

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非谓语动词考题解析:be sorry与opportunity的搭配用法about workingD. to have left; for working 这道非谓语动词考题极易混淆be sorry的搭配结构以及不定式不同形式的用法。不少同学难以分清be sorry to do与be sorry for doing的场景差异,同时还会混淆不定式一般式与完成式所表达的时间关系。我们先来拆解句子逻辑,前半句意思是离开这家...

must be done和must have been done差几个词,意思却不同,你选对了吗The construction of the school building _ before the end of next year. A. must have cormpleted B. must have been completed C. must be comple... 更别忽略主语和动词的被动关系。正确答案B“must have been completed”看似最复杂,实则最精准,它用一个组合拳打穿了时间、语态和情态...

动作未发生用to do,动作已完成用doing/to have doneabout workingD. to have left; for working 这道非谓语动词考题很容易混淆be sorry搭配结构以及不定式不同形式的用法,不少同学分不清be sorry to do与be sorry for doing的场景差异,同时混淆不定式一般式与完成式表达的时间关系,我们先拆解句子逻辑,前半句意思是离开这家公司我会感到...