had加過去分詞,是過去完成時,指在過去看來已經(jīng)完成的動作,have、has加過去分詞是現(xiàn)在完成時,指從現(xiàn)在看來已經(jīng)完成的動作…親，可以舉個例句么?望采納主語+have(has)+過去分詞(done)
1.現(xiàn)在完成時用來表示現(xiàn)在之前已發(fā)生過或完成的動作或狀態(tài),但其結(jié)果卻和現(xiàn)在有聯(lián)系,也就是說,動作或狀態(tài)發(fā)生在過去但它的影響現(xiàn)在還存在.
I have lost my wallet.(含義是:現(xiàn)在我沒有錢花了.)
Jane has laid the table.(含義是:已可以吃飯了.)
Michael has been ill.(含義是:現(xiàn)在仍然很虛弱)
He has returned from abroad. (含義是:現(xiàn)在已在此地)
2. 現(xiàn)在完成時可以用來表示發(fā)生在過去某一時刻的,持續(xù)到現(xiàn)在的情況,常與for,since連用.
Mary has been ill for three days.
I have lived here since 1998.
3. 現(xiàn)在完成時往往同表示不確定的過去時間狀語連用,如already, yet, just, before, recently,still, lately等:
He has already obtained a scholarship.
I haven't seen much of him recently (lately).
We have seen that film before.
Have they found the missing child yet康桑阿密達(dá)