今天有同學(xué)問我while的用法，while語句的用法，我索性整理了一下，寫了這篇小文章跟所有同學(xué)分享。while是一個(gè)很重要的寫作用詞，用法很多，希望大家學(xué)完今天的微課就明白了它的用法。
while作名詞用，表示“一會(huì)兒”：
1）She likes to take a nap for a while after lunch. 她喜歡午飯后瞇一會(huì)兒。
2）it takes a while to fit in the society for an overseas student. 留學(xué)生需要花一段時(shí)間適應(yīng)當(dāng)?shù)厣睢?/p>
While作連詞：
1.引導(dǎo)時(shí)間狀語
1）We must strike while the iron is hot.趁熱打鐵。
2）While he is speaking, he likes to do a lot of gestures. 他演講的時(shí)候有很多手勢。
2. 引導(dǎo)讓步狀語從句，意思是“雖然…但是….”(多放于句首)
1）While he loves China, he finds it hard to live there after being abroad for long time. 雖然很愛中國，但旅居海外多年的他還是不適應(yīng)中國的生活。
2）While my heart is willing, my flesh is weak. 心有余而力不足（雖然我的心是愿意的，但是我的肉體是虛弱的）
3. 引導(dǎo)條件狀語，意思是“只要”
1）While there is life there is hope.留得青山在，不怕沒柴燒。
2）While there is a way, there is away.有志者事竟成。
While作并列連詞用，意為“然而”，表對比關(guān)系。而but表轉(zhuǎn)折。（請注意體會(huì)下列例句中while與but的區(qū)別）：
1）Some people waste food while others haven't enough. 有些人很費(fèi)糧食，然而有些人卻吃不飽。
2）The son was having a good meal at home, while the parents were working in the fields.
兒子在家吃好飯而父母卻在田里辛勤勞作。
3）I ought to have helped her, but I never could. 我本該幫她但沒能。
4）Honey is sweet, but the bee stings. 蜂蜜很甜，但蜜蜂有刺蜇人。
連詞“while”具有兩種意義，因此為了避免誤用，使用時(shí)需多加注意。
“while”作為連詞來使用的時(shí)候，表示“同時(shí)性”或“對比性、對立”。根據(jù)文章的內(nèi)容可明確該詞具體表達(dá)了哪一種意義的情況固然存在，但如同下文中所展示的相反情況同樣存在。
The temperature decreased while the growth rate increased.
這句話可產(chǎn)生“溫度下降的同時(shí)生長速度加快了”和“與溫度下降所不同的是，生長速度卻加快了”兩種翻譯。
正解是：若要使后者的翻譯成立，“decreased”和“while”之間的逗號必不可少，因此目前的情況下無法直接確定此句的翻譯。為了使上文的句意能夠明確，就該如同下文的例句一般進(jìn)行修改。
同時(shí)性：
(1) The temperature decreased as the growth rate increased.
(2) The temperature decreased, and simultaneously, the growth rate increased.
(3) As simultaneous phenomena, the temperature decreased and the growth rate increased.
對比性：
(4) Although the temperature decreased, the growth rate increased.
(5) The temperature decreased, though the growth rate increased.
(6) The temperature decreased, but the growth rate increased.
(7) Whereas the temperature decreased, the growth rate increased.
(8) The temperature decreased, whereas the growth rate increased.
(9) Despite the fact that the temperature decreased, the growth rate increased.
*“while”除了連詞以外還能作為其他此類來使用，不同的詞性皆具其特有的意義。