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高中英語(yǔ)語(yǔ)法狀語(yǔ)從句難點(diǎn)分析
以下是小編為大家分享的高中英語(yǔ)語(yǔ)法狀語(yǔ)從句難點(diǎn)分析，一起來(lái)看看吧。
狀語(yǔ)從句可分為時(shí)間、地點(diǎn)、原因、目的、結(jié)果、方式、讓步、條件和比較狀語(yǔ)從句，其中有些連詞可引導(dǎo)多種狀語(yǔ)從句，表達(dá)不同的意義;也有某一從句可用多個(gè)連詞引導(dǎo)，表達(dá)相同的意義，這就使得狀語(yǔ)從句成為一大難點(diǎn)，下面就容易引起混淆的引導(dǎo)詞作簡(jiǎn)要介紹。
一、while while常表示“當(dāng)……的時(shí)候;然而;盡管”。
如：The students were busy taking notes while they were listening to the lecture. The young mostly enjoy pop music while the old usually prefer classical. While there exists much unemployment in almost all cities， people with special skills are still in great demand.
注意：while 表示“盡管”時(shí)，相當(dāng)于although / though / as，但while / although引導(dǎo)的讓步狀語(yǔ)從句不用倒裝語(yǔ)序，though引導(dǎo)的狀語(yǔ)從句可以倒裝也可以不倒裝，而as引導(dǎo)的狀語(yǔ)從句則必須倒裝。
如：Though the bride is happy / Happy though the bride is， she will feel homesick at the beginning. Happy as the bride is， she will feel homesick at the beginning.
二、until和till until和till都表示“直到”，常可互換，但till一般不用于句首，也不可用于強(qiáng)調(diào)句中。
1. until / till從句或短語(yǔ)與肯定的主句連用時(shí)，主句的謂語(yǔ)必須是延續(xù)性動(dòng)詞，表示主句的動(dòng)作一直持續(xù)到until / till所表示的時(shí)間為止。
如：You may stay here until the rain stops. Mr. Bush remained there till his brother arrived.
2. until / till從句或短語(yǔ)與否定的主句連用時(shí)，主句的謂語(yǔ)必須是非延續(xù)性動(dòng)詞，表示“直到……才”，即主句的動(dòng)作到until / till所表示的時(shí)間才開始。
如：David won‘t go to bed until / till his wife returns. Leo didn’t come until he had gone over his lesson.
3. not until ......位于句首時(shí)，主句須用倒裝語(yǔ)序。
如：Not until I began to work did I realize how much time I had wasted.
4. not until …… 結(jié)構(gòu)可用于強(qiáng)調(diào)句中。
如：It was not until she came to see us that we knew her mother was ill in bed.
三、so that so that可以引導(dǎo)目的狀語(yǔ)從句與結(jié)果狀語(yǔ)從句。
1. 當(dāng)表達(dá)的含義是“為了、以便”時(shí)，為目的狀語(yǔ)從句，此時(shí)，從句的謂語(yǔ)部分通常帶有情態(tài)動(dòng)詞;當(dāng)表達(dá)“以至于、因此”時(shí)，為結(jié)果狀語(yǔ)從句。
如：If you do know， answer in a loud enough voice so that all the class may hear. (目的狀語(yǔ)從句)
It rained hard the day before yesterday， so that we had to stay at home. (結(jié)果狀語(yǔ)從句)
2. 當(dāng)從句之前的so that可用in order that代替時(shí)，為目的狀語(yǔ)從句;反之，為結(jié)果狀語(yǔ)從句。
如：We now study hard so that we may work well in the future. (= We now study hard in order that we may work well in the future.) (目的狀語(yǔ)從句)
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