grammar動詞時態(tài)-文庫吧資料
2025-05-20 08:46本頁面
【正文】 hat you would e, but you didn39。 31 過去完成時 ? 概念：表示過去的過去 ? |||其構(gòu)成是 had +過去分詞 那時以前 那時 現(xiàn)在 用法 ? a. 在 told, said, knew, heard, thought等動詞后的賓語從句。 ? 39。t need to describe her. I ___ her several times. ? A. had met B. have met C. met D. meet ? 答案 B. 首先本題后句強調(diào)對現(xiàn)在的影響，我知道她的模樣，你不用描述。clock. ? 他一直睡到 10點。clock. ? 他到 10 點才回來。 (表經(jīng)歷 ) 29 ? 2) 用于 till / until從句的差異 ? 延續(xù)動詞用于肯定句，表示 做 …… 直到 …… 瞬間動詞用于否定句，表示 到 …… ，才 …… ? He didn39。 (表結(jié)果 ) ? I39。 ? I have been here since 1989. ? ? 2) since +一段時間 + ago ? I have been here since five months ago. 27 ? 3) since +從句 ? Great changes have taken place since you left. ? Considerable time has elapsed since we have been here. ? 4) It is +一段時間 + since從句 ? It is two years since I became a postgraduate student. 28 延續(xù)動詞與瞬間動詞 ? 1) 用于完成時的區(qū)別 ? 延續(xù)動詞表示經(jīng)驗、經(jīng)歷； 瞬間動詞表示行為的結(jié) 果，不能與表示段的時間狀語連用。 ) 25 ? 小竅門： 當現(xiàn)在完成時 +一段時間，這一結(jié)構(gòu)中，我們用下面的公式轉(zhuǎn)化，很容易就能排除非延續(xù)動詞在完成時中的誤使。 ? I worked here for more than twenty years. ? (我現(xiàn)在已不在這里工作。t received his letter for almost a month. 23 比較 since和 for ? Since 用來說明動作起始時間， for用來說明動作延續(xù)時間長度。即動作不發(fā)生的狀態(tài)是可以持續(xù)的。 This is the largest fish I have ever seen. It is / was the first time +thatclause 的句型中，從句要用完成時。 22 ? (2) Have you ____ been to our town before? ? No, it39。ve heard him sing. 這是我第一次聽他唱歌。ve (ever) seen. ? 這是我看過的最好的電影。 ? 錯） Tom has written a letter to his parents last night. ? （對） Tom wrote a letter to his parents last night. 20 用于現(xiàn)在完成時的句型 ? 1） It is the first / second time…. that… 結(jié)構(gòu)中的從句部分，用現(xiàn)在完成時。 ) ? I have finished my homework now. ? Will somebody go and get Dr. White? ? He39。 ? She returned yesterday. ? 她是昨天回來了。t handed in his paper? ? （強調(diào)有卷子，可能為不公平競爭。） 18 ? Why did you get up so early? ? （強調(diào)起床的動作已發(fā)生過了。 ? 舉例： ? I saw this film yesterday. ? （強調(diào)看的動作發(fā)生過了。 ? 2）過去時常與具體的時間狀語連用，而現(xiàn)在完成時通常與模糊的時間狀語連用，或無時間狀語。其構(gòu)成： have (has) +過去分詞。m leaving tomorrow. ? Are you staying here till next week? 14 現(xiàn)在完成時 ? 現(xiàn)在完成時用來表示之前已發(fā)生或完成的動作或狀態(tài)，其結(jié)果的確和現(xiàn)在有聯(lián)系。常用詞為 e, go, start, arrive, leave, stay等。ll write to you as soon as I arrive there. 13 ? 4）在動詞 hope, take care that, make sure that等后。 ? The train leaves at six tomorrow morning. ? When does the bus start? It starts in ten minutes. 12 ? 2）倒裝句，表示動作正在進行，如： ? Here es the bus. = The bus is ing. ? There goes the bell. = The bell is ringing. ? 3）在時間或條件句中。m going to play football tomorrow afternoon. (主觀安排 ) 11 一般現(xiàn)在時表將來
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