英语中能构成谓语的动词大致有三种:B 动词、情态动词、实意动词。一般来说,动词的原形、过去式、过去分词等指的是实意动词的原形、过去式、过去分词、过去完成式。这里就用实例来阐述吧!如实意动词do的这四种形式分别为 do-did-done-had done。其中 do 用于一般现在时态中,例如:I do my homework every day. 那么did 用于一般过去时态中,例如:She did a good job. 而 done 要和 be 动词l构成被动语态或和have 一起构成现在完成时态,例如:Her job was done by me . They have done this job. 最后, had done 则可构成 do的过去完成时态,When he came ,I had done my homework.
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