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t代替。但用as和that引導(dǎo)讓步狀語從句時必須倒裝。倒裝形式主要有以下幾種。A、名詞+though(as、that)+主語+be動詞Manager though(as、that) he is, he is very modest.這時作表語的單數(shù)可數(shù)名詞放在句首時,名詞不能同冠詞連用。B、形容詞+ though(as、that)+主語+謂語Strong though you are, you can’t lift it.這時作表語的形容詞前不能添加任何表示程度的副詞。C、副詞+ though(as、that)+主語+謂語Hard as he works, he was unable to make great progress.D、原形動詞+ though(as、that)+主語+助動或情態(tài)動詞Fail many times as he did, he never lost heart.Search though they might, they can’t find anybody in the house.E、現(xiàn)在分詞+ though(as、that)+主語+be動詞或助動詞Raining as it is, I’m going to visit you.Living, as he does, alone in the mountain, he feels pleased.F、過去分詞+ though(as、that)+主語+be動詞Praised as he was, he remained modest.但上述有些結(jié)構(gòu)并非總是表示讓步,名詞或過去分詞放在句首時也可以表示原因。例如:Child as he is, he doesn’t experience some social problems.Born as he is in a rich family, he grows up better than others.Tired as he was, he stopped working and went to bed.(原因)Tired as he was, he continued to work.(讓步)結(jié)果狀語從句①so……that和such……that這兩個短語表示“如此……以至于……”,常用的結(jié)構(gòu)如下。so+形容詞(副詞)+thatso+形容詞+a(an)+可數(shù)名詞單數(shù)+thatsuch+形容詞+復(fù)數(shù)名詞+thatsuch+形容詞+不可數(shù)名詞+thatsuch+a(an)+形容詞+可數(shù)名詞單數(shù)+thatThe boy is so young that he can’t go to school.He had so many papers to do that he stayed up late.I had so little money that I couldn’t afford that car.He is such a clever boy that everyone likes him.=He is so clever a boy that everyone likes him.②so that、so和so that這三個詞也可引導(dǎo)結(jié)果狀語從句,也可理解為so that中的so或that可省略一個。so that最常見,so和that多用于口語中。so that引導(dǎo)的結(jié)果狀語常用逗號同主句隔開。例如:He got up late, so that he didn’t catch the first bus.He didn’t ob