時(shí)當(dāng)，盛年不重來一日難在晨及時(shí)當(dāng)勉勵(lì)歲月不待人的意思是什么

來源：整理時(shí)間：2024-01-31 23:32:12 編輯：律生活手機(jī)版

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1，盛年不重來一日難在晨及時(shí)當(dāng)勉勵(lì)歲月不待人的意思是什么
2，when可以用在什么句式結(jié)構(gòu)中
3，ever當(dāng)什么意思講用現(xiàn)在完成時(shí)當(dāng)什么意思講可以不用現(xiàn)在完成時(shí)
4，when 和 while 的區(qū)別

1，盛年不重來一日難在晨及時(shí)當(dāng)勉勵(lì)歲月不待人的意思是什么

盛年不重來，一日難再晨。及時(shí)當(dāng)勉勵(lì)，歲月不待人：是東晉文學(xué)家、田園詩人陶淵明的《雜詩》八首之一，感嘆時(shí)間一去不復(fù)返，勉勵(lì)人們應(yīng)抓緊時(shí)間做有意義的事情。

盛年不重來一日難在晨及時(shí)當(dāng)勉勵(lì)歲月不待人的意思是什么

2，when可以用在什么句式結(jié)構(gòu)中

when 譯為“當(dāng)...時(shí)候 ”　　[when有引導(dǎo)過去式]； when I was young,I used to walk to the school.當(dāng)我小的時(shí)候,我過去經(jīng)常步行去學(xué)校.　　[when也引導(dǎo)一般現(xiàn)在時(shí)]； Switch off the tape when you leave the bath room.當(dāng)你離開洗手間時(shí),要關(guān)水龍頭.

when可以用在什么句式結(jié)構(gòu)中

3，ever當(dāng)什么意思講用現(xiàn)在完成時(shí)當(dāng)什么意思講可以不用現(xiàn)在完成時(shí)

1.一般用于疑問句中 eg.Have you ever been to beijing?2.若用在否定句中一般用never.eg.I have never gone to beijing.3.你說用于肯定句中可能與其他詞的搭配egfor ever 永遠(yuǎn)ever since 自從ever so 非常ever and again 偶爾ever favorites是永遠(yuǎn)最喜歡的.4.還可以與疑問詞連用構(gòu)成however,whichever,whatever,wherever等引導(dǎo)讓步狀語從句

ever當(dāng)什么意思講用現(xiàn)在完成時(shí)當(dāng)什么意思講可以不用現(xiàn)在完成時(shí)

4，when 和 while 的區(qū)別

when是短暫性動(dòng)詞,while是持續(xù)性動(dòng)詞，給你舉兩個(gè)列子，1 i was doing my homework while my mother was cooking in the kitchen.兩個(gè)動(dòng)作都是持續(xù)的。 2 i was watching TV when my father came back.其中"my father came back "就是短暫的動(dòng)作。

when和while的區(qū)別 ①when是at or during the time that, 既指時(shí)間點(diǎn)，也可指一段時(shí)間； while是during the time that，只指一段時(shí)間，因此when引導(dǎo)的時(shí)間狀語從句中的動(dòng)詞可以是終止性動(dòng)詞，也可以是延續(xù)性動(dòng)詞，而while從句中的動(dòng)詞必須是延續(xù)性動(dòng)詞。 ②when 說明從句的動(dòng)作和主句的動(dòng)作可以是同時(shí)，也可以是先后發(fā)生；while 則強(qiáng)調(diào)主句的動(dòng)作在從句動(dòng)作的發(fā)生的過程中或主從句兩個(gè)動(dòng)作同時(shí)發(fā)生。 ③由when引導(dǎo)的時(shí)間狀語從句，主句用過去進(jìn)行時(shí)，從句應(yīng)用一般過去時(shí)；如果從句和主句的動(dòng)作同時(shí)發(fā)生，兩句都用過去進(jìn)行時(shí)的時(shí)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(shí)，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(shí)”；while表示“而，卻”，表對(duì)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(shí)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。具體你可以參考這一段。 when，while，as引導(dǎo)時(shí)間狀語從句的區(qū)別 when，while，as顯然都可以引導(dǎo)時(shí)間狀語從句，但用法區(qū)別非常大。一、when可以和延續(xù)性動(dòng)詞連用，也可以和短暫性動(dòng)詞連用；而while和as只能和延續(xù)性動(dòng)詞連用。 ① Why do you want a new job when youve got such a good one already？（get為短暫性動(dòng)詞）你已經(jīng)找到如此好的工作，為何還想再找新的？ ②Sorry，I was out when you called me．（call為短暫性動(dòng)詞）對(duì)不起，你打電話時(shí)我剛好外出了。 ③Strike while the iron is hot．（is為延續(xù)性動(dòng)詞，表示一種持續(xù)的狀態(tài)）趁熱打鐵。 ④ The students took notes as they listened．（listen為延續(xù)性動(dòng)詞）學(xué)生們邊聽課邊做筆記。二、when從句的謂語動(dòng)詞可以在主句謂語動(dòng)作之前、之后或同時(shí)發(fā)生；while和as從句的謂語動(dòng)作必須是和主句謂語動(dòng)作同時(shí)發(fā)生。 1．從句動(dòng)作在主句動(dòng)作前發(fā)生，只用 when。 ①When he had finished his homework，he took a short rest．（finished先發(fā)生）當(dāng)他完成作業(yè)后，他休息了一會(huì)兒。 ②When I got to the airport，the guests had left．（got to后發(fā)生）當(dāng)我趕到飛機(jī)場(chǎng)時(shí)，客人們已經(jīng)離開了。 2．從句動(dòng)作和主句動(dòng)作同時(shí)發(fā)生，且從句動(dòng)作為延續(xù)性動(dòng)詞時(shí)，when，while，as都可使用。 ①When ／While ／As we were dancing，a stranger came in．（dance為延續(xù)性動(dòng)詞）當(dāng)我們跳舞時(shí)，一位陌生人走了進(jìn)來。 ②When ／While ／As she was making a phonecall，I was writing a letter．（make為延續(xù)性動(dòng)詞）當(dāng)她在打電話時(shí)，我正在寫信。 3．當(dāng)主句、從句動(dòng)作同時(shí)進(jìn)行，從句動(dòng)作的時(shí)間概念淡化，而主要表示主句動(dòng)作發(fā)生的背景或條件時(shí)，只能用 as。這時(shí)，as常表示“隨著……”；“一邊……，一邊……”之意。 ① As the time went on，the weather got worse．（as表示“隨著……”之意） ② The atmosphere gets thinner and thinner as the height increases．隨著高度的增加，大氣越來越稀薄。 ③As years go by，China is getting stronger and richer．隨著時(shí)間一年一年過去，中國變得越來越富強(qiáng)了。 ④The little girls sang as they went．小姑娘們一邊走，一邊唱。 ⑤The sad mother sat on the roadside，shouting as she was crying．傷心的媽媽坐在路邊，邊哭邊叫。 4．在將來時(shí)從句中，常用when，且從句須用一般時(shí)代替將來時(shí)。 ①You shall borrow the book when I have finished reading it．在我讀完這本書后，你可以借閱。 ②When the manager comes here for a visit next week，Ill talk with him about this．下周，經(jīng)理來這參觀時(shí)，我會(huì)和他談?wù)劥耸隆?三、when用于表示“一……就……”的句型中（指過去的事情）。 sb．had hardly（＝scarcely） done sth．when．．．＝Hardly ／ Scarcely had sb．done sth．when．．． ①I had hardly ／scarcely closed my eyes when someone knocked at the door．＝Hardly ／ Scarcely had I closed my eyes when someone knocked at the door．我剛一閉上眼，就有人在敲門了。 ②I had hardly ／scarcely entered my room when the telephone rang．＝Hardly ／Scarcely had I entered my room when the telephone rang．我剛一走進(jìn)房門，電話就響了

你記住第一條和第二條一般就可以了。

when是用來引導(dǎo)時(shí)間狀語從句，while也是，但是when強(qiáng)調(diào)的是某個(gè)時(shí)間點(diǎn)，while強(qiáng)調(diào)一邊|……一邊……。比如我一邊吃飯一邊看電視，就要用while，主句要用進(jìn)行時(shí)態(tài)，此外while還有表示轉(zhuǎn)折的意思