when do you use the helping verb Had and Has/have in a sentence.

熱心網(wǎng)友

hadbeen(過去完成時)表示以前已經(jīng)發(fā)生、完成了的事。不受人稱限制。一般句子后面有表示時間已過去的詞或短語提示。(如:last\ago\before)ex:Thisprojecthadbeenfinishedwhenhecameback。在他回來之前這個計劃已完成了。have\hasbeen(現(xiàn)在完成時)表示“到現(xiàn)在為止”已經(jīng)完成。受人稱限制。*通常句子中有since\now的就一定用此形式*( \you\復(fù)數(shù); \she\單數(shù))EX:Wehaven'tseenhimsincehewenttoU.S.A.自從他去了美國后(到現(xiàn)在)我們也再沒見過他了。

熱心網(wǎng)友

had been (had + 過去分詞）， 是過去完成時。表事情發(fā)生在過去的過去，與現(xiàn)在無關(guān)。eg.He had been a League member since he joined the army.此句表明：他在參軍前（---joined---)就是團(tuán)員了。have/has been,是現(xiàn)在完成時。表發(fā)生的事情與現(xiàn)在有關(guān)。eg.He has been in Beijing since he left here.此句表明：自他離開這兒（---left)，到現(xiàn)在他一直在北京。（他不在說話現(xiàn)場。即：He isn't here now. He is in Beijing.)

熱心網(wǎng)友

hadbeen(過去完成時)表示發(fā)生在過去的過去的時間ex:Thisprojecthadbeenfinishedbeforehecameback。在他回來之前這個計劃已完成了。其中CAME用的是過去時態(tài);have\hasbeen(現(xiàn)在完成時)表示“到現(xiàn)在為止”已經(jīng)完成。受人稱限制。*通常句子中有since\now的就一定用此形式*( \you\復(fù)數(shù); \she\單數(shù))EX:Wehaven'tseenhimsincehewenttoU.S.A.自從他去了美國后(到現(xiàn)在)我們也再沒見過他了。

熱心網(wǎng)友

Could you tell me how to use had been and Have/has been when you use the helping verb Had and Has/have in a sentence?學(xué)英語先從正確問問題入手吧

熱心網(wǎng)友

had been 用在過去完成時 Have/has been 用在現(xiàn)在完成時