一般现在时

1. 一般现在时的形式:
一般现在时的谓语动词使用动词原形或第三人称单数。疑问或否定时使用的助动词为do或does。

2. 一般现在时的用法:
1) 经常发生或反复发生的动作
* We have an exam every month. 我们每月测验一次。
* They usually go to school by bike. 他们经常骑自行车去上学。
* She doesn't work on Sunday. 她星期天不上班。
* Does Mike often play computer games? 迈克经常玩电脑游戏吗？
* What do they usually do on Saturdays? 星期六他们一般做些什么？

2) 现时的情况或状态
* Mother is ill. 母亲病了。
* Mary's father is a policeman. 玛丽的父亲是警察。
* He likes living in the country. 他喜欢住在乡下。
* These flowers look very beautiful. 这些花看起来很美。
* Mr. Smith teaches French. 史密斯先生教法语。
* We need a lot of money. 我们需要一大笔钱。

3) 永恒的真理
* The moon goes round the earth.月亮绕着地球转
* Summer follows spring. 春天之后是夏天。
* Knowledge is power. 知识就是力量。
* There are seven days in a week. 一个星期有七天。
* Glass breaks easily. 玻璃容易破。

4) 表示短暂动作
* The bus stops. 车停了。
* I beg your pardon．对不起，请原谅。
* I take it back．我收回我的话。
* We accept your offer．我们接受你的建议。

5) 表示将来情况
a) 口语
* -- When does the bus start? 车什么时候开？
-- It starts in ten minutes. 车十分钟后开。
* The plane takes off at 11:30 and arrives in Shanghai at l:20. 飞机11点半起飞，1点20分将抵达上海。
* Are you on duty next weekend? 下周末你上班吗？
* The boys start school on Monday. 孩子们星期一开学。
* I leave tonight. 我今晚就动身。

b) 时间或条件从句
* I'll call you as soon as I arrive there. 我到了马上给你打电话。
* When Tom comes, ask him how to fix the car. 汤姆回来了，问问他这车怎么修理。
* I won't come if it rains tomorrow. 明天若下雨我就不来了。
* If we hurry, we may catch the bus. 如果赶紧走我们可能赶得上公共汽车。
* Tell me in case you get into difficulty. 遇到困难请告诉我。

c) 用于其他从句中
* Take care that it does not occur again. 注意别再发生这样的事。
* I hope she has a good time next week. 我希望她下个星期过得开心。
* Whatever you say, I won't pay. 无论你说什么，我都不会付钱。
* I'll have a good time whether I win or lose. 赢也好，输也好，我都将会玩得开心。
* Watch that the baby doesn't go near the heater. 注意别让宝宝接近加热器

6) 表示过去动作
* John tells me you will leave tomorrow. 约翰告诉我你明天离开.
* The story begins in the year 1937. 故事开始于1937年。
* I hear that he got married last month. 我听说他上个月结婚了。
* The newspaper says that the president will retire next month. 报纸上说总统下个月会退休。