初中英语时态讲解.ppt
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1、初中英语时态练习,初中英语时态练习,一、一般现在时的用法,1)经常性或习惯性的动作,常与表示频度的时间状语连用。时间状语:every,sometimes,at,on Sunday I leave home for school at 7 every morning.He cycles to work every day.2)客观真理,客观存在,科学事实。The earth moves around the sun.Shanghai lies in the east of China.Water boils at 100 centigrade degrees.,3)表示格言或警句中。Pride
2、goes before a fall.骄者必败。注意:此用法如果出现在宾语从句中,即使主句是过去时,从句谓语也要用一般现在时。例如:Columbus proved that the earth is round.4)现在时刻的状态、能力、性格、个性。I dont want so much.Ann Wang writes good English but does not speak well.比较:Now I put the sugar in the cup.I am doing my homework now.第一句用一般现在时,用于操作演示或指导说明的示范性动作,表示言行的瞬间动作。再如:
3、Now watch me,I switch on the current and stand back.第二句中的now是进行时的标志,表示正在进行的动作的客观状况。,知识扩展:一般现在时表将来1)下列动词:come,go,arrive,leave,start,begin,return的一般现在时表将来。这主要用来表示在时间上已确定或安排好的事情。The train leaves at six tomorrow morning.When does the bus star?It stars in ten minutes.2)倒装句,表示动作正在进行,如:Here comes the bus.=
4、The bus is coming.There goes the bell.=The bell is ringing.3)在时间或条件句中。When Bill comes(不是will come),ask him to wait for me.Ill write to you as soon as I arrive there.4)在动词hope,take care that,make sure that等后。I hope they have a nice time next week.Make sure that the windows are closed before you leave
5、 the room,二、一般过去时的用法,1)在确定的过去时间里所发生的动作或存在的状态。时间状语有:yesterday,last week,an hour ago,the other day,in 1982等。Where did you go just now?I saw Tom in the street yesterday.I bought this TV set in Beijing last year.2)表示在过去一段时间内,经常性或习惯性的动作。When I was a child,I often played football in the street.He always w
6、ent to work by bus.He used to act like that.,3)用过去时表示现在,表示语气委婉礼貌。(1)动词want,hope,wonder,think,intend 等。例如:Did you want anything else?I wanted to ask you about that.Did you want to speak to me now?I wondered if you could help me.(2)情态动词 could,would,例如:Could you lend me your bike?4)用在条件句中表示与现在或将来事实不符的虚
7、拟语气。If I were a bird,I would fly to Beijing.If he were here now,we could turn to him for help.,注意比较下列句型:It is time for sb.to do sth“到时间了;该了”,例如:It is time for you to go to bed.你该睡觉了。It is time sb.did sth.“时间已迟了;早该了”,例如:It is time you went to bed.你早该睡觉了。would(had)rather sb.did sth.表示“宁愿某人做某事”,例如:Id r
8、ather you came tomorrow.一般过去时表示的动作或状态都已成为过去,现已不复存在。Christine was an invalid all her life.(含义:她已不在人间。)Christine has been an invalid all her life.(含义:她现在还活着)Mrs.Darby lived in Kentucky for seven years.(含义:达比太太已不再住在肯塔基州。)Mrs.Darby has lived in Kentucky for seven years.(含义:现在还住在肯塔基州,有可能指刚离去),三、一般将来时,1)s
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