彭現省
1. 以here或there開頭的句子,說明正在發生的動作,謂語動詞不用現在進行時,而用一般現在時。例如:
Here comes the bus!
There goes the bell!
2. 既定的時間如生日、日歷、課時安排、交通時間表等,通常用一般現在時表示將來的動作。例如:
The meeting starts at five oclock.
The train leaves at three this afternoon.
3. 在see to it, make sure, make certain, be sure, look out, take care等之后的從句要用一般現在時/一般過去時/現在完成時代替一般將來時/過去將來/將來完成時。例如:
You must make sure the door is closed before you leave the lab.
See to it that everything is OK.
4. 在賓語從句中,表示客觀事實或真理,一律用一般現在時。例如:
The teacher taught us yesterday that the moon circles the earth.
Somebody told me that you are a writer.
5. 在由as soon as, when, before, after, till等引導的時間狀語從句和由if,unless, as long as, in case等引導的條件狀語從句中,或在方式、讓步狀語從句中,常用一般現在時代替將來時,但主句用一般將來時。例如:
If you come this afternoon, Well have a meeting.
1. 表示說話人始料未及的事情用一般過去時。例如:
Oh! I didnt know you were in Shanghai.
2. 在wish, would rather之后的賓語從句中和在as if引導的狀語從句中,以及在it is time that...句型的定語從句中,謂語動詞用一般過去時說明現在的事情。例如:
Its time you had a holiday.
He looks as if he were young.
3. 用表示意愿及精神狀態的動詞,反映說話者探尋的態度時,動詞用一般過去時表示一般現在時,顯得更加禮貌。例如:
I didnt know you were here.
我不知道你在這里。(were實際上指現在)
I wondered if you could help me.
我在想你是否能幫助我。
4. 在含有hardly/scarcely... when, no sooner... than結構的句子中,主句用過去完成時,從句用一般過去時。
Hardly had I entered the room, when I heard a loud noise.
1. 若句中帶有always, all the time, forever, constantly等詞或短語,則用進行時表示一個頻繁發生的動作,表示說話人贊賞或厭惡等感情。例如:
You are always forgetting the important things.
你總是忘記重要的事。
2. 某些詞如come, go, leave, arrive, start等可用現在進行時表示將來。例如:
He is leaving tomorrow.
The visitors are arriving in a few minutes.
1. 表示故事發生的背景。例如:
One day Jones was walking along the street.
一天,瓊斯正在街上走。
It was snowing as thay made their way to the front.
他們往前面走的時候正在下雪。
2. 與always, forever, constantly, continually, frequently等詞連用,表示過去經常發生的行為,往往帶有感情色彩。例如:
My brother was always losing his key.
我的哥哥/弟弟老是掉鑰匙?!?br>