語法是英語學(xué)習(xí)的基礎(chǔ)，也是的基礎(chǔ),，掌握好英語語法無論是對還是以后的英語學(xué)習(xí)都是有很大幫助的,。下面頻道為大家整理了常考知識講解,，一起來學(xué)習(xí)一下吧!
　　英語?？贾R點講解：動詞時態(tài)
　　1)現(xiàn)在完成進行時態(tài) (have/has been -ing 分詞構(gòu)成): 動作或狀態(tài)從過去某時開始,繼續(xù)到現(xiàn)在,可能繼續(xù)下去,也可能剛剛結(jié)束.
　　I’ve been writing letters for an hour. I’ve been sitting in the garden.
　　2)過去完成進行時(由had been ing分詞構(gòu)成): 過去某個時刻以前一直在進行的動作
　　I’d been working for some time when he called. We had been waiting for her for two hours by the time she came.
　　3)將來完成進行時: 將來某個時刻以前一直在進行的動作.
　　By next summer, he will have been working here for twenty years. In another month’s time she’ll have been studying here for three years.
　　4)將來完成時(由shall/will have 過去分詞構(gòu)成): 將來某時會業(yè)已發(fā)生的事.
　　I shall have finished this one before lunch. They’ll have hit the year’s target by the end of October.