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常用時(shí)態(tài)用法比較
一、一般現(xiàn)在時(shí)和現(xiàn)在進(jìn)行時(shí)的區(qū)別1. 一般現(xiàn)在時(shí)用于說明經(jīng)常發(fā)生的動(dòng)作或存在的狀態(tài)及客觀現(xiàn)實(shí)或普遍真理;現(xiàn)在進(jìn)行時(shí)用于描述正在進(jìn)行的動(dòng)作,即描述暫時(shí)性的情景、活動(dòng)或發(fā)生的事情。例如:
Mary is cleaning her room. (動(dòng)作正在進(jìn)行)
Mary cleans her room every day. (動(dòng)作經(jīng)常發(fā)生)
2. 表示狀態(tài)、感覺或心理活動(dòng)的一些動(dòng)詞,如 know ,love ,hate ,like ,fear ,think ,want ,believe , see ,hear 等不用于進(jìn)行時(shí)態(tài)。例如:
I like Chinese very much. (正)
I am liking Chinese very much. (誤)
二、一般過去時(shí)和現(xiàn)在完成時(shí)的區(qū)別
1. 一般過去時(shí)只強(qiáng)調(diào)過去的事實(shí),不表示和現(xiàn)在的關(guān)系,通常與表示過去時(shí)間的狀語連用;現(xiàn)在完成時(shí)強(qiáng)調(diào)過去的一個(gè)動(dòng)作或狀態(tài)與現(xiàn)在的關(guān)系,如對現(xiàn)在產(chǎn)生的結(jié)果、影響等,不能和表示過去時(shí)間的狀語連用,但可和表示段時(shí)間的狀語連用。例如:
The students have cleaned their classrooms.
(表示現(xiàn)在的教室是窗明潔凈的)
The students cleaned their classrooms yesterday. But it is dirty now.
�。ū硎咀蛱旖淌沂歉蓛舻�,現(xiàn)在又臟了)
2. 現(xiàn)在完成時(shí)的謂語動(dòng)詞是瞬間動(dòng)詞時(shí),不能跟表示段時(shí)間的狀語連用。例如:
The bus has left for ten minutes. (誤)
The bus has been away for ten minutes. (正)
The bus left ten minutes ago. (正)
It is ten minutes since the bus left. (正)
三、現(xiàn)在完成時(shí)和現(xiàn)在完成進(jìn)行時(shí)的區(qū)別
1. 現(xiàn)在完成時(shí)的著眼點(diǎn)是動(dòng)作的完成;現(xiàn)在完成進(jìn)行時(shí)的著眼點(diǎn)是動(dòng)作的繼續(xù)。例如:
I have read an English novel.
(強(qiáng)調(diào)結(jié)果,表示已讀完一本英語小說)
I have been reading an English novel.
�。◤�(qiáng)調(diào)動(dòng)作一直在進(jìn)行)
2. 表示狀態(tài)、感覺或心理活動(dòng)的動(dòng)詞,如 be ,know ,see ,hear ,like ,hate ,love ,believe 等一般不用于現(xiàn)在完成進(jìn)行時(shí),如果表示狀態(tài)一直持續(xù)到現(xiàn)在,可用現(xiàn)在完成時(shí)。例如:
I have been knowing him since he was born. (誤)
I have known him since he was born. (正)
四、現(xiàn)在進(jìn)行時(shí)和現(xiàn)在完成進(jìn)行時(shí)的區(qū)別
現(xiàn)在進(jìn)行時(shí)強(qiáng)調(diào)此刻正在進(jìn)行某一動(dòng)作;現(xiàn)在完成進(jìn)行時(shí)強(qiáng)調(diào)過去某一個(gè)動(dòng)作一直延續(xù)到現(xiàn)在,該動(dòng)作有可能剛剛結(jié)束,也有可能還在進(jìn)行。例如:
It has been snowing for five hours.
�。◤�(qiáng)調(diào)雪一直下了五個(gè)小時(shí))
It is snowing now.
�。ㄖ徽f明正在下雪)
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