全国公共英语三级常见语法解析
引导语:以下内容由应届毕业生培训网整理而成,希望对广大考生有所帮助,谢谢您的观看。
一、一般将来时:
1、be to+动词原形:表示安排或计划好了的动作。例:The Third-Ring Road is to be open to traffic before National Day.
2、be about to+动词原形:表示即将发生的动作。例:The lecture is about to begin.讲座即将开始。
3、一些表示动作趋势,如开始、终结,以及一些表示动作方向,如往来的动词,常常用现在进行时态表示按照安排将于将来发生的事情,这类动词常见的有如:start,go,leave,come,arrive等。例:We are leaving for Beijing tomorrow. 我们明天动身去北京。
二、一般现在时:
1、由when、as soon as、the minute、the moment、till、until等引起的时间状语从句,以及由if、unless、provided that等引起的条件状语从句常常用一般现在时态表示将来的动作,而主句则用一般将来时态。
例:They will go home for winter vocation as soon as they finish their exams.
2、当表示普遍的真理或者众所周知的客观事实,常常用一般现在时态。例:The earth is round. 地球是圆的。
三、一般过去时:区分三个短语的用法:
1、used to do sth:过去常常做某事。
2、be/get used to doing sth:习惯做某事。
3、be used to do sth:被用于做某事。
四、进行时态:
重点区分when和while引起的时间状语的用法。
When表示时间上的点,在考试中其引导的时间状语从句多翻译为“这时?”,主句多用进行时态;while引导的时间状语从句多翻译为“正当……时”,该从句用进行时态。 例:One of the guards was sleeping when the general came in, which made him very angry.
I fell and hurt myself while I was playing tennis.
五、现在完成时:
重点区分have (has) been to:某人去过某地,表示一种经历,强调状态,可以和once,twice,often,never,ever连用;
Have (has) gone to:某人在去某地的途中或已在某地,强调动作。此句型不能与上述时间状语连用。例:He has gone to America.他已经去了美国。He has been to America twice.他去过美国两次。
六、过去完成时:
1、强调一个动作发生在另外一个过去的动作之前时,用过去完成时。
2、It was the first/second/last time that? 在该句型,that从句用过去完成时态。
七、将来完成时:
常常标志性地由by、by the time、by the end of引起一个表示将来时间段的时间状语,主句用将来完成时态。
八、感官动词的用法及其被动语态:
在英语中,常见的感官动词有“五看二听一感觉”(see、watch、look、notice、observe;hear、listen to、feel),在主动语态中用动词原形或现在分词作宾补,如see sb do/doing sth,改为被动语态时则要加to,如sb be seen to do sth.
九、使役动词的用法及其被动语态:
在英语中,常见的使役动词有make、let、have,在主动语态中用动词原形做宾补,如make sb do sth,改为被动语态时则要加to,如sb be made to do sth, 两种形式都表示使/让某人做某事的意思。例:We were made to study hardy.我们被要求努力学习。
十、英语中常考的句式结构一:sth need/ want/ require doing 某物需要?(=sth need/want/require to be done)(此句式主语为物)例:My room is a mess. It needs tidying up(整理)。
十一、英语中常考的句式结构二:have/get sth done 请/让别人做某事(have/get后接宾语为物)
例:I have taken many photos. I‘m going to get the filmdeveloped. 五、情态动词的被动语态,其构成为:情态动词+be+过去动词。例:The work must be finished before lunch. 这项工作必须在午饭前干完。
十二、情态动词用于对现在内容推测的常见句型有:
1、Can/may do sth:表示对现在内容的可能性的推测;
2、Must do sth:表示对现在内容的肯定性的推测。
十三、情态动词用于对过去内容推荐的常见句型:
1、can/may have done sth:表示对过去内容的可能性;
2、must have done sth:表示对过去内容的肯定性的推测。
例:1、Mr Green must have failed to receive my letter, otherwise he would have replied.
2、I believe he must have had an accident, otherwise he would have arrived on time.
十三、虚拟语气的基本内容
根据虚拟与其这种与事实相反的假设所对应的时间不同,虚拟语气的if虚拟条件从句与主句的谓语动词分别有三类构成形式:
假设类型If虚拟条件从句
主句与现在事实相反 Did/were Would/should do 与过去事实相反 Had done Would/should have done 与将来事实可能相反 Were to do/did/should do Would/should do
例:1、I wouldn't talk that way if I were Peter.
2、If the whole operation had not been planned before hand, a great deal of time and money
would have been lost
3、Jean doesn't want to work right away because she thinks that if she were to get a job she probably wouldn’t be able to see her friends very often.
4、I would ask George to lend us the money if I knew him.
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