2013年職稱英語理工類考試輔導-句型語序技巧(7)
當主句的謂語動詞是think, believe, guess, expect, imagine, suppose等時,如果賓語從句是否定結(jié)構(gòu),通常把主句謂語動詞改為否定式,而將賓語從句改為肯定式,這種現(xiàn)象叫做“否定轉(zhuǎn)移”。
I don’t think we two have met before.
We don’t believe that he could finish his work in such a short time.
She doesn’t think it is right for John to come late to school.
三、表語從句 (The Predicative Clause):通常置于主句的系動詞之后,說明主句主語的情況。
My idea is that we should help her do housework every Sunday.
Is that why you had a few days off?
It is because I have never heard of the story.
四、同位語從句 (The Appositive Clause):常置于某些名詞之后,對其內(nèi)容作解釋或補充說明。如:
advice, demand, doubt, fact, hope, idea, news, order, problem, promise, question, request, suggestion, truth, wish, word等。
The news that we won the game is exciting.
There is no doubt that he is the best player in their country.
同位語從句與定語從句的區(qū)別:
同位語從句對所修飾詞作補充說明,而定語從句對前面名詞起限定作用;
that在同位語從句中只起引導作用,無詞義,無語法成分,而在定語從句中指代所修飾詞并在從句中作主語或賓語。
比較:The idea that one can do the work without thinking is wrong. (同位語從句)
The idea that you put forward at the meeting is wrong. (定語從句)
c. 狀語從句(Adverbial Clause)
狀語從句在復合句中作狀語,修飾主句中的謂語動詞、副詞、形容詞或整個句子。根據(jù)句子的含義,它可表時間、地點、原因、目的、結(jié)果、條件、行為方式、比較、讓步等。狀語從句通常由一個連詞引起,有時由一個起連詞作用的詞組引起。
一.時間狀語從句
I) when,while和as
He entered the room when (while, as) the meeting was going on.
when 通常指一時的動作或狀態(tài),可表示從句動作與主句動作同時發(fā)生,或先于主句動作;while常用來引導兩個同時進行的持續(xù)時間較長的動作;as常用來引導兩個動作緊接著發(fā)生,強調(diào)“同一時間”或“一前一后”。
When I meet the right chance, I will try my best.
While the teacher explained the text, the students listened attentively and took notes
He sang songs as he was taking a bath.
As spring warms the earth, all flowers begin to bloom.
注:when有時作并列連詞意為“正在這時”、“突然”,在句末,不能位于句首。從句的謂語動詞常用一般過去時,主句通常用過去進行時、過去完成時或be about to結(jié)構(gòu)等。
She was about to leave when Mark arrived so she stayed a little longer.
He had been walking under the trees when an apple fell down.
Ⅱ) as soon as, hardly (scarcely, barely) … when… , no sooner …than… 等引導的時間狀語從句,意為“ 一… 就 …”
Jack had scarcely /hardly seen me when he left the room.
The spy had no sooner returned home than he was told to go to another country.
那個間諜一踏進國門就奉命要去他國。
注: 在no sooner … than, hardly … when …引導的時間狀語從句中,若把no sooner, hardly, scarcely, barely 放在句首,則要用倒裝結(jié)構(gòu)。
No sooner had he heard the news than he fainted.
Scarcely had he entered the room when the telephone rang
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