纯动词原形就是现在时态Ilovemygirlfriend!V+ed/动词过去式是一般过去时态Ilovedyou!will+V原形/begoingto是一般将来时Iwillgotoschool.have/has+done（动词过去分词）现在完成时Ihavefinishedmyhomework.Shehasfinishedherhomework.had+done（动词过去分词）过去完成时Ihadfinishedmyhomework.还有现在完成时的标志性词语：ever,never,since,already,yet,before.twice,once,threetimes.
