while和when的區(qū)別以及實例句型
while和when的區(qū)別以及實例句型
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)的時間狀語從句中的謂語動詞既可以是終止性動詞,也可以是延續(xù)性動詞,而while引導(dǎo)的時間從句中的謂語動詞必須是延續(xù)性動詞。
如:He fell asleep when/ while he was reading. (read是延續(xù)性動詞)
他看書時睡著了。
It was raining hard when we arrived. (arrive是終止性動詞)
我們到達時正下著大雨。
若主、從句表示兩個同時進行的持續(xù)性動作,且強調(diào)主句表示的動作延續(xù)到從句所指的整個時間,通常要用 while。
如:Don’t talk while you’re eating. 吃飯時不要說話。
I looked after the baby while her mother was out.她媽媽外出時我照顧她。
Strike while the iron is hot.(is是延續(xù)性動詞,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/突然…) 這個句型中,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/突然…) 這個句型中,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/突然…)這個句型中,只能用when。
如:She was having lunch when an old friend came to visit her.
她正在吃午飯,這時她的一個老朋友來看她。
5. 在“sb had done…when sb did…”(某人剛做完某事,這時/突然…)這個句型中,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. 上一個句型的倒裝形式是“Hardly /Scarcely had sb.done sth.when sb.did...”(一…就…) 這個句型中,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)
她何時回來在很大程度上取決于天氣。
4. 引導(dǎo)定語從句的時候用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€人去野餐的那段時光嗎?
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,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,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,可是他對他們很嚴(yán)格。
7. 作并列連詞用,意思為“而,然而”,表示對比,用while。
如:Some people waste food while others haven't enough.
有些人浪費糧食,然而有些人卻吃不飽。
He is strong while his brother is weak.
他長得很結(jié)實,而他弟弟卻很瘦弱。
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