PREPOSITIONS OF TIME

PREPOSITIONS 前置词

1 - PREPOSITIONS OF TIME

At

used to show the time 时间:

e.g. at three o'clock.


Structure: At:

at + 某特别时间: at dawn 黎明,at midday日中, at noon正午, at night, at midnight 午夜, at nine o'clock

at + the + 一段时间 : at the start of July/the year, at the end of the week/month/year

at + 节日: at Christmas, at New Year, at Easter.

at + 餐: at breakfast, at lunch, at tea, at dinner, at supper etc..



Structure: On:

on + day of the week: on Monday, on Tuesday, on Wednesday etc.

on + particular part of a day: on Friday morning, on Saturday afternoon.

on + particular date: on 25 July 2001, 4 January.


on + calendar festival day: on Christmas Day, on Easter Sunday.

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TENSE REV. 2


1. SIMPLE PRESENT TENSE一般现在时

第一种用法---永恒真理 general statement, facts(that do not change), telling the truth


Water boils at 100 。C.
The sun rises in the east.



第ニ种用法---.现时的情况， 人或物的一般特征，反复发生的动作，习惯性

He gets up at six.
I don’t smoke.

I always have an apple for lunch.


Adverbs副词 of frequency:(表示经常性的副词)

当见到以下字词时，便用简单现在式：
always, usually, generally, often, sometimes, occasionally, seldom/rarely, never, EVERYDAY.



第三种用法-- Opinion and consensus意见与一致同意

Smoking kills.
John has a bad haircut.
Bill's new novel is an exciting story.




第四种用法---指引道路
“ You go straight on to the traffic lights, then you turn right.”



第五种用法----在here and there之后

Here comes the bus！
There goes the bell.


第六种用法----Simple conditional在时间或条件从句中，须用一般时表示将来动作

We’ll let you know as soon as you arrive.

If you work hard, you will pass the exam.
If I see Nancy I’ll ask her.


第七种用法----Planned activities/future timetables，表示未来计划或时间表

The bus departs/leaves开出 at 3 p.m. (现在是1.00p.m.)
He leaves for London next week.
My flight leaves at 10:00.
The train leaves in five minutes’ time.
The plane takes off at 9.20 a.m.


第八种用法---- 某些从句中，可用一般时表示将来动作

I hope that you feel better soon.(不是...you will feel better soon.)
Assuming it rains tomorrow, what shall we do？(不是...it will rain ...
Whatever happens, I’m going(不是 whatever will happen,...)


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today 今日

tomorrow 明日
the day after tomorrow 后日
two days later 大后日
x days later x日之后

yesterday昨日
the day before yesterday 前日
two days before 大前日
x days before x日前

英语一字多解






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