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ⅲ、表語從句
表語從句與系詞(以及半系動(dòng)詞)一起構(gòu)成主句的謂語結(jié)構(gòu)。
 my problem(問題) is how we can reduce(減少,降低) this high(高的) temperature(溫度).
 
it seems that it is going to rain(下雨).
it seems/ seemed that...好像/似乎...
 
the cloth(布) feels(摸起來) as if(= as though/好像) it were made of silk(絲綢).

ⅳ、同位語從句
同位語從句用以說明名詞的內(nèi)容,使之明確而具體化。常帶同位語從句的名詞有conclusion(結(jié)論), doubt(懷疑), fact(實(shí)事), fear(擔(dān)心), hope(希望), idea(想法), news(消息), opinion(觀點(diǎn)), suggestion(建議)等。從句通常由that引導(dǎo),有時(shí)也可由whether, what, when, where, why, how等引出。
there is no doubtthat he will succeed(成功).
 
my opinion that no action(行動(dòng)) need be taken yet(還) is shared(共有, 共享) by most(大多數(shù)) of us here(這兒).

     狀語從句
   在復(fù)合句中起狀語作用的從句叫狀語從句,可表示時(shí)間、地點(diǎn)、原因、目的、結(jié)果、條件、讓步等意義。
 
i. 時(shí)間狀語從句
時(shí)間狀語從句通常由when(在...時(shí)候),whenever(每當(dāng)),as(當(dāng)...時(shí)候,隨著...),while(在...期間),before(在...以前),after (在...之后),since(自從...以來),as soon as (一...就),until(till) (直到...才)等連詞引導(dǎo), 如:
a well-mannered(有禮貌的) person never laughs at (嘲笑)people when they are in trouble(麻煩).
 
while betty was getting dressed穿衣服), she kept looking at (看)the clock.
 
the fields(天地) don’t require(需要) irrigation(灌溉) until weather(天氣)is dry.