爱因你浪漫
幼苗
共回答了19个问题采纳率:89.5% 举报
一般现在时.动词原形do
如:I do my homework every day
一般过去时.动词原形后加ed
如:What did you do on Friday I visited my grandmother (did是do的过去时,visited是visit的过去时)
现在进行时.be动词加动词ing
如:I am watching TV now
现在完成进行时:had been doing(doing可以是任何动词原形加ing)
如:I have been writing letters for an hou
1年前
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