56家副部级企业:一般现在时怎么用

用法一: 表示现在经常性或习惯性的动作。(动词用原型，第三人称+s)
　　1.Tom wears a belt round his waist. 汤姆腰里系着一根皮带。
　　解析：Tom (第三人称)wears(wear+s 即原型+s) a belt round his waist.
　　这里表示经常性的、习惯性的动作，Tom 昨天腰里系着一根皮带，今天也系了，明天、后天……或许一直系了着，一直处于这种状态。
　　2.The train goes backwards and forwards between the two towns. 这列火车在两座城市间来回开。
　　3. I leave home for school at 7 every morning.
　　用法二： 观真理，客观存在，科学事实。
　　The earth moves around the sun.
　　Shanghai lies in the east of China.
　　The sick child is better today. 生病的孩子今天身体好点了。
　　I enjoy songs such as this one. 我欣赏这样的歌曲。
　　I like all musical instruments except the violin. 除了提琴我什么乐器都喜欢。
　　用法三： 表示现在的能力、特征、职业等。
　　He sings well. 他唱歌唱得好。
　　Mr. Smith teaches French. 史密斯先生教法语。
　　用法四： 表示客观真理、科学事实、格言以及不受时间限制的客观存在。
　　Summer follows spring. 春去夏来。
　　Knowledge is power. 知识就是力量。
　　The earth turns around the sun. 地球绕着太阳转。
易错点击：
在做题时，错误主要出现在人称及句式变换上。
　　其句式变化可分为两种情况
　　1)表示动作， 一般人称作主语的，变否定句须在动词前加助动词don’t;变一般疑问句须在句首加助动词do。
　　例. They have lunch at 12:00. They don’t have lunch at 12:00. Do they have lunch at 12:00?
　　2) 单三人称做主语的，变否定句须在动词前加助动词doesn’t;变一般疑问句须在句首加助动词does。
　　例. Jenny speaks English very well.
　　Jenny doesn’t speak English very well.
　　Does Jenny speak English very well?
　　含有be动词的要在be上做变化.
　　例. Danny is a good student.
　　Danny isn’t a good student.
　　Is Danny a good student?
　　其时间状语为often、 usually、 always、 sometimes等频率副词，on Saturdays、 in the morning(afternoon evening) 、every day 等。

一般现在时的用法

1) 经常性或习惯性的动作，常与表示频腮度的时间状语连用。
时间状语： every…, sometimes, at…, on Sunday
I leave home for school at 7 every morning.

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.
3) 表示格言或警句中。
Pride 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：Columbus proved that the earth is round..

4) 现在时刻的状态、能力、性格、个性。
I don't 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：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，所以后句用一般现在时。

////////////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. = 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.
I'll 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 the room.

（一）一般现在时可表示现在的状态
例如:I'm tweleve. Where 's the schoolbag?I have there pung~pong balls and two ping~pong bats.
（二）还可以表示经常的或习惯性的动作。
例如:“Where's my shoolbag?”Gina always asks. I don't play sports _I only watch them on TV.
（三）亦可表示主语具备的性格和能力等。
例如:Bill likes beef，but he doesn't like chicken。

请您参考初中教材第一册，里面有详细的解释！