时态语态 专升本ppt课件.ppt
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1、【专升本 英语 语法基础】时态&语态By Gordon,英语共有16种时态,其表现形式如下(以study为例):,返回,一、一般现在时 主要用来表示人、事物的现在状况和特点:表示经常或习惯性的动作,句子中常有often,always,from time to time,everyday,sometimes等词。例子:1.He usually goes to work at 7 oclock every morning.2.She has a brother who lives in New York.3.The earth goes around the sun.4.Guangzhou is
2、situated in the south of China.,考点一:表示永恒的真理,即使出现在过去的语境里,也要用一般现在时。I learned that the earth is bigger than the moon when I was in primary school.考点二:在时间和条件状语从句中,代替一般将来时。常用的引导词有:时间:when,until,after,before,as soon as,once,the moment/the minute,the day;条件:if,unless,provided I will let her know if she com
3、es back.考点三:在the morethe more句型中,若主句是一般将来时,从句通常用一般现在时。The harder you study,the better job you will get.,二、一般过去时 表示过去某个特定时间发生且完成的动作,或过去习惯性的动作,不强调对现在的影响,只说明过去。常跟明确的过去时间连用,如:yesterday,last night,in 1984,at the time/moment,once,during the war,before,a few days ago,whenetc.考点一:used to do 表示过去习惯做,但现在已不再做的
4、事。区别:be/become/get used to doing 表示现在习惯做某事。He used to smoke a lot.He has got used to getting up early in the morning.I am used to having breakfast now.考点二:在时间和条件状语从句中,代替过去将来时。He promised to buy me a computer if he got a raise.She wanted to go shopping if she had money.,三、一般将来时 表示将来某个时间会发生的动作或情况。常和to
5、morrow,next year,in 2020等表示将来的时间状语连用。考点一:一般将来时总是用在一些时间状语从句或条件状语从句的主句中We will begin our class as soon as the teacher comes.(主句用一般将来时,从句中一定要用一般现在时替代一般将来时)考点二:某些表示短暂性动作的动词,如:arrive,come,go,leave,start等,用现在进行时表示将来时。I am leaving for Beijing tomorrow.I am coming home soon.考点三:祈使句+and/or+句子,这种结构中and后面的句子谓语
6、用一般将来时。Study hard and you will make it one day!,考点四:一般将来时的五种句型1.Will do2.Be(am,is,are)going to do3.be to do4.Be about to do5.be on the point of doingI was about to sleep when she called me.They are to be married in this May.It is on the point of raining.,完 成 时,助动词:have结构:have+动词(be动词)的过去分词现在完成时:have
7、+done过去完成时:had+done将来完成时:will have+done注意:1.完成时的被动结构;2.完成时与完成进行时的区别。,四、现在完成时 表示动作发生在过去,完成在过去,强调与现在情况仍有联系,其结果和影响仍存在。考点一:for+时间段;since+时间点They have lived in Beijing for five years./since 1995.I have learned English for ten years.考点二:常见的不确定的时间状语:lately,recently,just,already,yet,up to now,till now,so fa
8、r,these days,etc.Has it stopped raining yet?My girlfriend has been back already.考点三:表示“最近几世纪、年、月以来”时间状语中,谓语动词用现在完成时。In the past few years/months/weeks/days;over the past few years;during the last three months;for the last few centuries;through centuries;throughout historyetc.,考点四:表示“第几次做某事”,或在“it is
9、 the best(worst,most interesting)+名词+that”后面跟现在完成时。This is my first time that I have visited China.This is the most interesting film I have ever seen.That is the only book that he has written.五、过去完成时 表示过去某个时间之前已经完成的动作,即过去完成时的动作发生在“过去的过去”,句中有明显的参照动作或时间状语。这种时态从来不孤立使用(before,after,by,up till)。There had
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