备考小升初英语动词时态总汇
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1、比较过去时与现在完成时
1)过去时表示过去某时发生的动作或单纯叙述过去的事情,强调动作;现在完成时为过去发生的,强调过去的事情对现在的影响,强调的是影响。
2)过去时常与具体的时间状语连用,而现在完成时通常与模糊的时间状语连用,或无时间状语。
一般过去时的时间状语:
yesterday, last week,ago, in1980, in October, just now, 具体的时间状语
共同的时间状语:
this morning, tonight,this April, now, once,before, already, recently,lately
现在完成时的时间状语
for, since, so far, ever, never, just, yet, till / until, up to now, in past years, always,
不确定的时间状语
3)现在完成时可表示持续到现在的动作或状态,动词一般是延续性的,如live, teach, learn, work, study, know.
过去时常用的非持续性动词有come, go, leave, start, die, finish, become, get married等。
举例:
I saw this film yesterday.
I have seen this film.
Why did you get up so early?
Who hasn t handed in his paper?
She has returned from Paris.
她已从巴黎回来了。
She returned yesterday.
她是昨天回来了。
He has been in the League for three years.
He has been a League member for three years.
He joined the League three years ago.
I have finished my homework now.
---Will somebody go and get Dr. White?
---He s already been sent for.
句子中如有过去时的时间副词时,不能使用现在完成时,要用过去时。Tom has written a letter to his parents last night.
Tom wrote a letter to his parents last night.
2 用于现在完成时的句型
1)It is the first / second time . that 结构中的从句部分,用现在完成时。It is the first time that I have visited the city.
It was the third time that the boy had been late.
2)This is the that 结构,that 从句要用现在完成时.
This is the best film that I ve seen.
这是我看过的最好的电影。
This is the first time I ve heard him sing. 这是我第一次听他唱歌。
典型例题
---Do you know our town at all?
---No, this is the first time I ___ here.
A. was
B. have been
C. came
D. am coming
答案B. This is the first time 后面所加从句应为现在完成时,故选B。
---Have you ____ been to our town before?
---No, it s the first time I ___ here.
A. even, come
B. even, have come
C. ever, come
D. ever, have come
答案D. ever意为曾经或无论何时,反意词为never,此两词常用于完成时。This is the largest fish I have ever seen. It is / was the first time +that-clause 的句型中,从句要用完成时。
注意:非延续性动词的否定形式可以与表示延续时间的状语连用。即动作不发生的状态是可以持续的。
I have received his letter for a month.
I haven t received his letter for almost a month.
3 比较since和for
Since 用来说明动作起始时间,for用来说明动作延续时间长度。
I have lived here for more than twenty years.
I have lived here since I was born..
My aunt has worked in a clinic since 1949.
Some new oilfields have been opened up since 1976.
I have known Xiao Li since she was a little girl.
My brother has been in the Youth League for two years.
I have not heard from my uncle for a long time.
注意:并非有for 作为时间状语的句子都用现在完成时。
I worked here for more than twenty years.
I have worked here for many years.
小窍门:当现在完成时+一段时间,这一结构中,我们用下面的公式转化,很容易就能排除非延续动词在完成时中的误使。