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英語語法時(shí)間狀語從句關(guān)鍵詞講解
這是CN人才網(wǎng)小編準(zhǔn)備的英語語法時(shí)間狀語從句關(guān)鍵詞講解，歡迎瀏覽。
一、什么是時(shí)間狀語從句呢，其實(shí)，我們只要看到幾個(gè)關(guān)鍵詞就可以了，也就是用表示時(shí)間的連詞連接一個(gè)句子作狀語，這樣的主從復(fù)合句就是時(shí)間狀語從句。
連接時(shí)間狀語從句的連接詞有:when(當(dāng)……時(shí))，while(在……期間)，as(當(dāng)……，一邊……一邊……)，before(在……之前)，after(在……之后)，since(從……以來)，till/until(直到)，whenever(無論何時(shí))，as soon as(一……就)等，這里要特別注意的一點(diǎn)是，如果主句是一般將來時(shí)，從句只能用一般現(xiàn)在時(shí)表示將來意義。同樣的道理，主句是過去將來時(shí)和將來完成時(shí)，從句只能用一般過去時(shí)和現(xiàn)在完成時(shí)表示將來意義。例如：
1.When I went into the classroom, he was reading.
當(dāng)我走進(jìn)教室時(shí)，他正在看書。
2.He read a newspaper as he went along.
他邊走邊看報(bào)紙。
3. I didn't realize how special my mother was until I became an adult.
直到我成年了，我才意識(shí)到我的媽媽是多么的特別。
4.We must strike while the iron is hot.
我們必須趁熱打鐵。
5.I’ll telephone you as soon as I get there.
我一到達(dá)那里就打電話給你。
二、由before和after引導(dǎo)的時(shí)間狀語從句
before的意思為“在……之前”，根據(jù)具體語境還可理解為“還沒來得及/還沒有……就……，趁著還沒……就……，不知不覺就……，……才……”等。注意before引導(dǎo)的從句不再用否定式的謂語，并且當(dāng)before引導(dǎo)的從句位于主句之后，有時(shí)譯成"就，才"。如果before引導(dǎo)的主句謂語用的是過去完成時(shí)，則從句動(dòng)詞多用一般過去時(shí)，這樣以便體現(xiàn)動(dòng)作發(fā)生的先后。After表示主句動(dòng)作發(fā)生在從句動(dòng)作之后。主句和 從句的動(dòng)作的時(shí)間關(guān)系正好與before引導(dǎo)的從句相反。例如:
1.They had not been married four months before they were divorced.
他們結(jié)婚還不到四個(gè)月就離婚了。
2.After you think it over, please let me know what you decide.
你仔細(xì)考慮過以后，告訴我你是怎樣決定的。
3.He almost knocked me down before he saw me.
他幾乎把我撞倒才看到我。
4.Time passed quickly and three months went by before she knew it.
時(shí)間過得飛快，她不知不覺就在那里度過了三個(gè)月。
5.I will die before I will betray my country.
我寧可死也不會(huì)背叛我的國(guó)家。
三、時(shí)間的英語是“time”，time可引導(dǎo)時(shí)間狀語從句，含有time 短語有every time, each time, (the) next time, (the) last time, by the time, the first time, any time 等，例如：
1. Every time I listen to music, I’ll think of it.
每當(dāng)我聽音樂，我就想起這事。
2.He didn’t tell me anything the last time I saw him.
上次我見到他時(shí)他什么也沒告訴我。
四、除了我們?cè)跁r(shí)間狀語從句中經(jīng)常用到的as soon as表示“一……就……”還有很多詞語表示“一……就……”，例如：the moment, the minute, the second, the instant;immediately, directly, instantly;no sooner…than…, hardly/scarcely…when…。它們也都可以引導(dǎo)時(shí)間狀語從句。例如：
1. I came immediately you called.
你一來電話我就來了。
2.I had no sooner got home than it began to rain.
我一到家就下起雨來了。
如果hardly, scarcely 或no sooner置于句首，句子必須用倒裝結(jié)構(gòu)。如：
1.Hardly/Scarcely had I got home when it began to rain.
2. No sooner had I got home than it began to rain.
我一到家，外面就開始下雨。
五、首先，我們從一個(gè)since引導(dǎo)的時(shí)間狀語從句的例句中，看看since在引導(dǎo)時(shí)間狀語從句的用法，——Have you known Dr.Jackson for a long time?------Yes,since he jioned the Chinese Society. 在這個(gè)例句中，since引導(dǎo)的從句的謂語動(dòng)詞可以是延續(xù)性的動(dòng)詞，又可以是瞬時(shí)動(dòng)詞。一般情況下，從句謂語動(dòng)詞用一般過去時(shí)，而主句的謂語動(dòng)詞用現(xiàn)在完成時(shí)。例如：
I have made great progress since I was ill.
我自病愈以來取得了很大的進(jìn)步。
值得注意的是：在It is +時(shí)間+since從句的句型中，主句多用一般現(xiàn)在時(shí)。例如:1. Where have you been since I last saw you?
自上次我和你見面以后，你到哪里去了?
2. It is four years since my sister lived in Beijing.
我妹妹不在北京住有四年了。
另外，since前有ever，或從句謂語動(dòng)詞是be且后接表示人成長(zhǎng)過程中的某個(gè)階段或年齡的名詞、形容詞時(shí)，仍然按字面意思理解。例如：
I have lived here ever since I was a child.
我從還是個(gè)孩子時(shí)就一直住在這兒。
相關(guān)閱讀：
Year-end panic refers to the self-reproach and overall feeling of panic brought about by the approach of the year's end, often due to a poor financial year and pressure from work and family.
“年關(guān)焦慮癥”指的是年關(guān)將至而產(chǎn)生的自責(zé)和恐慌心理，通常由年度收入不佳、工作和家庭壓力引起。
Year-end review, personnel changes at work, large amount of festival spending, etc., may cause frustration, helplessness, anxiety and panic in many, some even with conditions like stomatch disorder, headache or insomnia.
年終總結(jié)，人事變動(dòng)，年貨花銷，等等，讓很多人感到厭煩、無助、焦慮、恐慌，甚至出現(xiàn)腸胃不適、頭疼、失眠等一系列亞健康癥狀。
Psychological experts suggest that we should avoid peer competition. The end of the year is the best time to review and look ahead. There will surely be huge pressure, but the new year can also be an exciting beginning. While regretting for the failed plans in the past year, you can still make resolution to do it better in the coming year.
心理專家建議不應(yīng)盲目攀比。年關(guān)是一個(gè)回顧和展望的好時(shí)機(jī)。壓力是很大，但新的一年即將開始也讓人振奮!也許你還在為沒有實(shí)現(xiàn)的目標(biāo)后悔不已，但是你還是可以下定決心在來年做得更好!
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