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      while和when的區(qū)別過去進(jìn)行時(while和when)

      發(fā)布時間:2024-07-16 20:30:42來源:

      哈嘍,大家好~~~我是小編田甜,關(guān)于while和when的區(qū)別過去進(jìn)行時,while和when這個很多人還不知道,那么現(xiàn)在讓田甜帶著大家一起來看看吧!

      兩者的區(qū)別如下: ①when是at or during the time that, 既指時間點(diǎn),也可指一段時間; while是during the time that,只指一段時間,因此when引導(dǎo)的時間狀語從句中的動詞可以是終止性動詞,也可以是延續(xù)性動詞,而while從句中的動詞必須是延續(xù)性動詞。

      ②when 說明從句的動作和主句的動作可以是同時,也可以是先后發(fā)生;while 則強(qiáng)調(diào)主句的動作在從句動作的發(fā)生的過程中或主從句兩個動作同時發(fā)生。

      ③由when引導(dǎo)的時間狀語從句,主句用過去進(jìn)行時,從句應(yīng)用一般過去時;如果從句和主句的動作同時發(fā)生,兩句都用過去進(jìn)行時的時候,多用while引導(dǎo),如: a. When the teacher came in, we were talking. 當(dāng)此句改變主從句的位置時,則為: While we were talking, the teacher came in. b. They were singing while we were dancing. ④when和while 還可作并列連詞。

      when表示“在那時”;while表示“而,卻”,表對照關(guān)系。

      如: a. The children were running to move the bag of rice when they heard the sound of a motor bike. 孩子們正要跑過去搬開那袋米,這時他們聽到了摩托車的聲音。

      b. He is strong while his brother is weak. 他長得很結(jié)實(shí),而他弟弟卻很瘦弱。

      when; while 當(dāng)……時候while能用when代替; 但是when卻不一定能用while代替.while+從句, 動作一定會延續(xù)when+延續(xù)性動詞/瞬間動詞; when he arrivedwhen he diedwhen,while強(qiáng)調(diào)動作同時發(fā)生過去進(jìn)行時 : 在過去的某一點(diǎn)時間, 或者是過去某一動作同時發(fā)生的另外一個動作瞬間動詞(arrive)無進(jìn)行時態(tài)I am arriving 進(jìn)行時態(tài)表示將要When he arrived,I was having dinner.同時發(fā)生的兩個動作, 均用過去進(jìn)行時When I was doing my homework,my mother was cooking.When my mother was doing the housework,my father was watching TV.同時發(fā)生的兩個動作1.一個用一般過去時, 另一個用過去進(jìn)行時2.分工的情況, 均用過去進(jìn)行時When the plane arrived,...were waiting inside the main buildingwhile others were waiting on...While......were keeping guard at the door,two others opened the parcel.表面上是分工, 兩個動作同時發(fā)生, 不是同時開始同時結(jié)束, 延續(xù)時間不一致, 長一點(diǎn)時間的動作用進(jìn)行時態(tài), 短時間的動作用過去時.When someone knocked at the door,I was having dinner.when和while引導(dǎo)的時間狀語從句與這一時態(tài)連用。

      所以區(qū)別when和while的用法成了這一單元的難點(diǎn)。

      (一)、when,while都有“當(dāng)……時候”的意思。

      when既可表示某一點(diǎn)時間,也可以表示某一段時間 。

      在when引導(dǎo)的時間狀語從句中,其謂語動詞可以是延續(xù)性的,也可以是非延續(xù)性的,可與主句中的謂語動詞同時發(fā)生,也可在其后發(fā)生。

      例如: I was just reading a book when she came into my room. 她走進(jìn)我房間時,我正在看書。

      2、Were you writing when the teacher came in? 老師進(jìn)來的時候,你在寫信嗎? 3、When he was a child he was always trying out new ideas. 他小時候就常常試驗(yàn)一些新的設(shè)想。

      (二)、while只能表示某一段時間,不能表示某一點(diǎn)時間。

      在while引導(dǎo)的時間狀語從句中,其謂語動詞只能是延續(xù)性的,而且也只能與主句中的謂語動詞同時發(fā)生或存在。

      例如: While Jim was mending his bike, Lin Tao came to see him. 正當(dāng)吉姆修自行車時,林濤來看他。

      2、You can’t do your homework while you’re watching TV. 你不能一邊看電視一邊做家庭作業(yè)。

      (三)、另外,when和while的區(qū)別還在于:while引導(dǎo)的時間狀語從句多用進(jìn)行時態(tài),而when引導(dǎo)的時間狀語從句多用一般時態(tài)。

      例如: While they were talking , the bell rang. 正在他們談話的時候,上課鈴響了。

      2、I was doing my homework when my mother came back home yesterday evening. 昨天晚上媽媽回家的時候,我正在做家庭作業(yè)。

      when/while都可做并列連詞.前者表and at that time,(這時,突然),后者表對比,可譯為”然而”I was going downstairs when the telephone rang.Lucy is in blue while Lily is in green. when后加瞬間動詞 while后也可加持續(xù)性動詞when和while在引導(dǎo)狀語從句時, 都可表示“當(dāng)什么什么的時候”如   Doctor Smith called when 或while we were preparing dinner.   當(dāng)我們正在做飯的時候, 史密斯醫(yī)生來訪了   When 或While I was in Shanghai, I met with the pop star.   當(dāng)我在上海時, 碰巧遇到了那位流行歌星  【注意】   (1) when表示“什么什么的時候”, 從句中既可以用延續(xù)性動詞, 表示狀態(tài)或時間段, 也可以用非延續(xù)性動詞, 表示動作或時間點(diǎn); while表示“當(dāng)什么什么的時候”、“在什么什么期間”, 從句中只能用延續(xù)性動詞, 表示狀態(tài)或時間段。

      例如:   It was snowing when we arrived at the station.   When he came in, we all stood up, smiling.   I was very fat when / while I was a child.   When / While she was typing, someone knocked at the door.   (2)在when或while所引導(dǎo)的狀語從句中, 如果從句的主語和主句的主語相同, 且動詞又是be動詞時, 從句的主語和be動詞往往可以省略。

      例如:   When / While (I was) walking along the street, I heard my name called.   When / While (you’re) in trouble, turn to me for help.      2. when和while都可以表示“盡管、雖然”, 但when經(jīng)常指描述的事實(shí)或結(jié)果事與愿違或出人意料, 而while在語氣上含有讓步之意。

      例如:   The boy was watching TV when he should have gone to bed.   雖然那孩子該睡覺了, 但他還在看電視。

        The old couple prefer walking when they might take a taxi.   盡管可以坐出租車, 那對老夫婦更愿意步行。

        While I accept that he is not perfect, I do actually like the person.   盡管我承認(rèn)他并不完美, 但我確實(shí)真地喜歡他這個人。

        While he loves his students, he is very strict with them.   雖然他愛他的學(xué)生, 但對他們的要求也很嚴(yán)格。

           3. when的其它含義和用法:   (1) 就在那時候 (= and then)   We were camping on the hill when it began to rain.   我們正在山上露營, 突然下起雨來了。

        I was about to enter the room when the door was closed.   我正要進(jìn)屋, 門忽然被關(guān)上了。

        (2) 倘若, 如果 (= if)   How can you hope for others’ help when you won’t lend your hand?   如果你不愿幫助別人, 又怎能指望得到別人的幫助呢?   Turn off the switch when anything goes wrong with the machine.   如果機(jī)器出故障的話, 把開關(guān)關(guān)掉。

        (3) 既然 (多置于主句后面, 語氣不如since強(qiáng))   I can’t tell you when you won’t listen.   既然你不愿意聽, 我也不會告訴你。

        Why leave it with me when you have enough time?   既然你有足夠的時間, 干嘛把事情留給我?      4. while的其它含義和用法:   (1) 然而, 可是   I like coffee, while my sister likes tea.   我喜歡咖啡, 而我姐姐喜歡喝茶。

        I was preparing for the exam while they were chatting.   我在準(zhǔn)備考試, 可他們卻在閑聊。

        (2) 只要   While there is water, there is hope of life.   只要有水, 就有生存的希望。

        I’ll offer help to those poor children while I’m alive.   只要我活著, 就要幫助那些貧困的孩子when幾乎可用于任何時態(tài),不受限制.。

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