【正文】
到昨天才看完)這里關(guān)鍵是必須有介詞by說明在“昨天之前”。如有過去時(shí)間,但無法說明在此之前的決不可用過去完成時(shí)?! ∽ⅲ孩佟皶r(shí)間名詞+before”在句子中作狀語,謂語動(dòng)詞用過去完成時(shí);“時(shí)間名詞+ ago”在句中作狀語,謂語動(dòng)詞用一般過去式?! ∪纾篐e said his first teacher had died at least 10 years before. Xiao Hua left school 3 years ago. ②表示“就.”的幾個(gè)句型:Hardly/Scarcely/No sooner had+主語+過去分詞+ when/than+一般過去時(shí)?! ∪纾篧e had no sooner been seated than the bus started. No sooner had we been seated than the bus started. ?、谠赽efore,after,as soon as,immediately,the moment,the minute。引導(dǎo)的時(shí)間狀語從句中用一般過去時(shí)態(tài)代替過去完成時(shí)?! fter he(had)left the room,the boss came in. We(had)arrived home before it snowed. As soon as he(had)arrived in Beijing,he got in touch with his friend. ?、廴绻麖木渲杏幸粋€(gè)過去的時(shí)間狀語,盡管從句中的動(dòng)作先于主句發(fā)生,但從句中的謂語動(dòng)詞連用過去式。如: He told me he read an interesting novel last night. ④由并列連詞but,and等連接,表示幾個(gè)連續(xù)發(fā)生的動(dòng)作,或在故事中按時(shí)間順序發(fā)生的動(dòng)作用一般過去時(shí)?! e bought a watch but lost it. He came here and then went to see his grandmother. :表示過去發(fā)生的某動(dòng)作一直持續(xù)到現(xiàn)在且仍然在進(jìn)行著。 The worker has been working in this pany ever since he graduated from college. 注:①如說話人不十分強(qiáng)調(diào)此動(dòng)作仍在進(jìn)行,也可用現(xiàn)在完成時(shí)?! he worker has worked in this pany since he graduated from college. ?、谟袝r(shí)可用現(xiàn)在完成進(jìn)行時(shí)代替現(xiàn)在完成時(shí),表示說話帶有強(qiáng)烈的感情色彩?! e looks very tired,for he has been painting the house all day. 10 / 10