while和when的區(qū)別以及實(shí)例句型
while和when的區(qū)別以及實(shí)例句型
你知道while和when的區(qū)別么。你知道while和when的區(qū)別中有多少不為人知的秘密么。下面由學(xué)習(xí)啦小編為你分享while和when的區(qū)別的相關(guān)內(nèi)容，希望對(duì)大家有所幫助。
when和while的有哪些區(qū)別
when和while的區(qū)別1
1. when引導(dǎo)的時(shí)間狀語從句中的謂語動(dòng)詞既可以是終止性動(dòng)詞，也可以是延續(xù)性動(dòng)詞，而while引導(dǎo)的時(shí)間從句中的謂語動(dòng)詞必須是延續(xù)性動(dòng)詞。
如：He fell asleep when/ while he was reading. (read是延續(xù)性動(dòng)詞)
他看書時(shí)睡著了。
It was raining hard when we arrived. (arrive是終止性動(dòng)詞)
我們到達(dá)時(shí)正下著大雨。
若主、從句表示兩個(gè)同時(shí)進(jìn)行的持續(xù)性動(dòng)作，且強(qiáng)調(diào)主句表示的動(dòng)作延續(xù)到從句所指的整個(gè)時(shí)間，通常要用 while。
如：Don’t talk while you’re eating. 吃飯時(shí)不要說話。
I looked after the baby while her mother was out.她媽媽外出時(shí)我照顧她。
Strike while the iron is hot.(is是延續(xù)性動(dòng)詞，表示一種持續(xù)的狀態(tài))
趁熱打鐵。
2. 在“be about to do…when…”(正要做…，就在這時(shí)/突然…) 這個(gè)句型中，只能用when。
如：One day, I was about to do some shopping when hetelephoned me.
一天,我正要去買東西,他打電話找我。
3. 在“be on the point of doing…when…” (正要做…，就在這時(shí)/突然…) 這個(gè)句型中，只能用when。
如：He was on the point of leaving when someone knocked at the door.
他剛要走就有人敲門。
4. 在“be doing …when…” (正在做…就在這時(shí)/突然…)這個(gè)句型中，只能用when。
如：She was having lunch when an old friend came to visit her.
她正在吃午飯，這時(shí)她的一個(gè)老朋友來看她。
5. 在“sb had done…when sb did…”(某人剛做完某事，這時(shí)/突然…)這個(gè)句型中，只能用when。
如：I had just taken a bite of my hot dog when I heard a familiar voice yelling at me from across the crowded school yard.
我剛吃了一口熱狗，突然聽到在擁擠的校園的那邊有個(gè)熟悉的聲音在喊我。
when和while的區(qū)別2
1. 在“sb.had hardly(=scarcely) done sth.when sb. did ...”(一…就…)這個(gè)句型中，只能用when。
如：I had hardly /scarcely closed my eyes when someone knocked at the door.
我剛一閉上眼，就有人在敲門了。
2. 上一個(gè)句型的倒裝形式是“Hardly /Scarcely had sb.done sth.when sb.did...”(一…就…) 這個(gè)句型中，只能用when。
如：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。
3. 引導(dǎo)名詞性從句時(shí)用when不用while。
如：When she'll be back depends much on the weather.( when 引導(dǎo)主語從句)
她何時(shí)回來在很大程度上取決于天氣。
4. 引導(dǎo)定語從句的時(shí)候用when不用while。
如：Do youremember the time when the three of us wenton a picnic?
你還記得我們?nèi)齻€(gè)人去野餐的那段時(shí)光嗎?
The days are gone forever when the Chinese people were looked down upon.
中國人民被人輕視的日子一去不復(fù)返了。
The main school holidays are from mid-December till earlyFebruary，when the days are long and warm.
學(xué)校的主要假期是從 12 月中旬到 2 月初，這段時(shí)間里白天長而且很溫暖。
5. 表示條件，相當(dāng)于 if ，引導(dǎo)條件狀語從句時(shí)用when。
如：How can I get a job when I can't even read or write?
如果我連讀和寫都不會(huì)，我怎么能找到工作呢?
6. 引導(dǎo)讓步狀語從句，意思是“雖然…但是….”、“盡管…但是…”時(shí)，用while (多放于句首) 。
如：While he loves his students，he is very strict with them.
雖然他愛他的學(xué)生，可是他對(duì)他們很嚴(yán)格。
7. 作并列連詞用，意思為“而，然而”，表示對(duì)比，用while。
如：Some people waste food while others haven't enough.
有些人浪費(fèi)糧食，然而有些人卻吃不飽。
He is strong while his brother is weak.
他長得很結(jié)實(shí)，而他弟弟卻很瘦弱。
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