初中英语时态之一般现在时

初中英语时态--- 一般现在时
基本结构：
基本结构：①be动词；②行为动词
否定形式：①am/is/are+not;②此时态的谓语动词若为行为动词，则在其前加don't,如主语为第三人称单数，则用doesn't，同时还原行为动词。

一般疑问句：①把be动词放于句首；②用助动词do提问，如主语为第三人称单数，则用does，同时，还原行为动词。

主要用于下面几情况：
1) 描述当前时间内经常出现、反复发生的动作或存在的状态。

在这种情景中，句子常带有表示频率的时间状语：always , often , everyday , sometimes , seldom , usually，never，once a week (month , year , etc.) ,now, today , nowadays等等，以表示句中的动作或状态是习惯性的、经常性的。

例如：
She doesn't often write to her family, only once a month. 她不常给家里写信，仅一月一封而已。

I cycle to work every day .我每天骑自行车上班。

It seldom rains here .这儿很少下雨。

2）仅为了描述状态、性质、特征、能力等等。

这里的目的是为了"描述现阶段的动作或状态"，其重点"不是强调动作发生的时间、或进行的状态"。

例如：
He can speak five foreign languages .他能说五种外语。

That is a beautiful city .那是座美丽的城市。

Changjiang River is one of the longest rivers in the world.长江是世界上最长的河流之一。

All my family love football .我全家人都喜欢足球。

My sister is always ready to help others .我妹妹总是乐于助人。

3) 陈述客观事实、客观真理。

顾名思义，客观的情况是"没有时间概念"的；也"不会在意动作进行的状态"。

例如：
The sun rises in the east .日出东方。

The earth goes around the sun .地球绕着太阳转。

Light travels faster than sound .光的速度比声音的速度快。

4) 根据英文语法规定，当主句的谓语动词是一般将来时，那么时间或条件状语从句的谓语动词只能用一般现在时来表示将来要发生的动作。

（主将从现）例如：
I'll tell him the news when he comes back.他回来时，我将告诉他这个消息。

If you take the job , they will talk with you in greater details.
如果你接受这份工作，他们将和你谈谈细节。

！！！！！特殊用法
1. 用于某些动词(tell, say, hear, learn, gather等)表示不确定的过去时间。

如：
I hear that he got married last month.我听说他上个月结婚了。

2.当要陈述一个客观事实时，有时即使有过去时间状语也可用一般现在时。

如：
The story begins in the year 1937.故事开始于1937年。

I learned that the earth goes ground the sun when I was in primary school.
练习题：
1）用动词的适当形式填空。

1.I often _________(do) my homework at 7.
2.He _________(read) English every day.
3.We _________(go)to school at seven in the morning.
4.Mike________(go)to school at seven in the morning.
5.My mother________(like) ______(go) shopping.
6.I can ________(draw) many beautiful pictures.
7.She_________(make) a model plane.
8.Do you ________(like)_________(run)?
9.Does he_________(like)_________(jump) ?
10.Does Nancy_________(grow)flowers on Saturday ?
11.The teachers________(like)___________(dance).
12.The teacher________(like)____________(dance).
13.The students___________(speak) English in class.
14.The student_________(speak) Chinese after class.
15. Let's____________and play football . ( go )
16. He_____________ like swimming . ( not )
17. Wang Bing is____________ ( write ) an E-mail to his friend .
18. _________you study English at school ? Yes , I___________. ( do )
19. __________your sister study English at school ? No , she__________ . ( do ) 2）单项选择：
1.The students will go to the Summer Palace if it _____ tomorrow.
A.don't rain
B. doesn't rain
C. won't rain
2. There _____ an English film next week.
A. will have
B. is going to have
C. is going to be
D. was going to be
3. The picture _______ nice. A.looks B.is looked C.look D.is looking
4.. I saw her ____ the room this morning.
A.to enter
B. entered
C. enter
D. enters
5.the teacher asked us ______ to school on time.
A. to come
ing
e
es
6. John is always ______ others.
A. help
B. helping
C. helps
D. to help
7. You'd better ______ at home and ______ your homework.
A. to stay, do
B. stay, do
C. to stay, to do
D. stay, to do
4）改句子
1.Do you often play football after school? (肯定回答)
2.I have many books. （改为否定句）
3.Gao Shan's sister likes playing table tennis （改为否定句）
4.She lives in a small town near New York. （改为一般疑问句）
5.I watch TV every day. （改为一般疑问句）
6.David has got a goal. （改为一般疑问句）
7.We have four lessons.（否定句）
8.Nancy doesn't run fast （肯定句）
9.My dog runs fast. 否定句：一般疑问句：
10.Mike has two letters for him. 一般疑问句：否定句：
11.I usually play football on Friday afternoon. 否定句: 一般疑问句
12.Su Yang usually washes some clothes on Saturday. 否定句: 一般疑问句
13.Mingming usually waters the flowers every day 否定句: 一般疑问句:
14.Tom does his homework at home. 否定句: 一般疑问句。