初中英语时态一般现在时现在进行时一般过去时过去进行时.doc
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一般现在时
1. 一般现在时的基本用法：
1) 经常性或习惯性的动作，常与表示频率副词的时间状语连用。
时间状语：every morning(afternoon, Sunday), sometimes, on Sunday, often, usually等.
例如：I wake up at six O’clock every morning.
My friends often go to the park on Sundays.
2) 用于表示客观真理，客观存在，科学事实。
例如：The earth moves around the sun.
Tomorrow is Tuesday.
3) 用于格言或警句中。
例如：Where there is a will, there is a way.
4) 用于表示现在时刻的状态、能力、性格、个性。
例如：I don't want so much.
She is a good girl and always help others.
My watch is very new。
2. 一般现在时的构成：
当主语是第一人称，第二人称或第三人称复数时，谓语动词要用动词原形。
当主语是第三人称单数时，谓语动词要用第三人称单数形式，即动词词尾要加s或es. 例. We have four classes in the morning every day.
They work in a big office.
She likes singing very much.
附注：动词的第三人称单数变化形式分为规则变化和不规则变化两种形式。
1. 规则变化：
（1）直接在动词词尾加-s.
ask---asks work---works get---gets stay---stays
（2）以字母s, x, ch, sh或o结尾的动词，在词尾直接加-es.
fix---fixes do---does go---goes pass---passes
watch---watches wash____washes
（3）以“辅音字母加“y”结尾的动词，要先变y为i再加-es.
try---tries study---studies cry---cries
2．不规则变化：
be---- is have----has
3. 一般现在时的句子转换：变否定句、一般疑问句
（1）一般疑问句：当句子中有be动词或情态动词时，则把be动词或情态动词提到主语的前面变成疑问句;
否定句：在be动词或情态动词后面加not变成否定句.
例：She is a student. I can swim.
→Is she a student? →Can you swim?
→She is not a student. →I can not swim.
（2）一般疑问句：当句子中即没有be动词，也没有情态动词时，则在主语前加助动词do, does 变成问句；
否定句：在主语后谓语动词前加助动词don’t, doesn’t变成否定句，助动词后的谓语动词要变成动词原形。
例：We get up at 7:00 every morning.
→Do you get up at 7:00 every morning?
→We don’t get up at 7:00 every morning.
She has a little brother.
→Does she have a little brother?
→She doesn’t have a little brother.
百看不如一练
一、写出下列动词的第三人称单数形式。
sit swim read make run write type go watch clean cry wash jump come study
二、用do、does填空
1、_____ you ride a bike after school? Yes, I ________.
2、______ your sister like football? No, she ______ not.
3、What_______ the students have? They have some pens.
4、How______ Linda go to school? She goes to school on foot.
5、He ______ not speak English. He speaks Chinese.
6、______ they watch TV on Sundays? Yes, they ______ .
7、My father and mother ______ not read newspapers on Saturday.
三、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：