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现在完成时表示过去发生或已经完成的某一动作对现在造成的影响或结果,或从过去开始一直延续到现在的动作或保存的状态。1.其句子结构是:肯定句:主语+have/has+动词的过去分词否定句:主语+haven’t/hasn’t+动词的过去分词一般疑问句:have/has+主语+动词的过去分词+其它…?回答:Yes,I have./No,I haven’t.Yes,she has./No,she hasn’t.1)过去发生的动作对现在造成的影响或结果。和already,never,ever,just,before,yet等状
It now indicates the effect or outcome of an action taken or completed in the past on the present, or the continuation of the action or preservation from the past onwards. 1. Its sentence structure is: positive sentence: subject + have / has + past participle of the verb Negative sentence: subject + have not / has not + past participle of verb General interrogative sentence: have / has + subject + verb past participle + other ... ? Answer: Yes, I have./No,I haven’t.Yes, she has./No,she hasn’t.1) The impact or result of the past actions in the past. And already, never, ever, just, before, yet and so on