謂語動(dòng)詞構(gòu)成：I/he/she/it was working; we/you/they were working
    (1) 表示過去某一時(shí)刻或過去某段時(shí)間內(nèi)正在進(jìn)行的動(dòng)作，一般要有表示過去時(shí)間的狀語
    At that time she was working in Oxford. 那時(shí)，她正在牛津大學(xué)工作.
    It was raining at 6 o'clock this morning. 今天早晨六點(diǎn)鐘天正下著雨.
    What were you doing when I phoned you last night? 昨晚我給你打電話時(shí)你在干什么？
    (2) 可用來表示由過去某時(shí)持續(xù)到另一時(shí)間的過去動(dòng)作
    He was studying in Cambridge between 1999 and 2001.
    在1999年和2001年那段時(shí)間，他在劍橋?qū)W習(xí).
    From January to March I was traveling in Egypt.
    從3月份到4月份期間，我在埃及旅游.
    (3) 表示故事發(fā)生的背景
    It was a sunny morning. Some people were sitting on the riverbank. Some were walking with their dogs. Several boys were playing football nearby...
    一個(gè)陽光明媚的清晨.河堤上坐著幾個(gè)人.有的人在溜狗.不遠(yuǎn)處有幾個(gè)男童在踢足球...
    (4) 與某些動(dòng)詞連用時(shí)，代替過去將來時(shí)
    這類動(dòng)詞有 come來, go去, leave離開, start開始, stay逗留 等.主語必須是人.
    He telephoned me, saying that his aunt was coming to see me soon.
    他打電話給我，說他姨很快就要看我了.
    五、現(xiàn)在完成時(shí)
    謂語動(dòng)詞構(gòu)成：I/we/you/they have worked; he/she/it has worked
    (1) 表示過去某一時(shí)刻發(fā)生，且延續(xù)到現(xiàn)在的動(dòng)作或狀態(tài)，這種情況常與表示一段的時(shí)間狀語連用
    We have lived here since last October. 自從去年十月份我們就一直住在這兒。
    She has studied English for 5 years. 她學(xué)英語已有5年之久
    (2) 表示某個(gè)已經(jīng)發(fā)生且對現(xiàn)在造成影響或結(jié)果的動(dòng)作，這種情況常不與任何時(shí)間狀語連用
    I'm sorry I have lost my key. I can't open the door.
    對不起，我把鑰匙弄丟了.門開不了了.
    She has left. If you want to see her, you'll have to come tomorrow.
    她已經(jīng)走了.如果你想見她的話，你得明天再來一趟.