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动词单三变化规律：
情况 | 构成方法 | 读音 | 例词 |
|---|---|---|---|
1.一般情况 | 加 -s | 清辅音后读/s/ 浊辅音和元音后读/z/ | swim- swims； help- helps； like- likes |
2.以辅音字母+o结尾的词 | 加 -es | 读/z/ | go- goes， do- does |
3.以s，sh，ch，x等结尾的词 | 加 -es | 读/iz/ | watch- watches， wash- washes |
4.以辅音字母+y结尾的词 | 变y 为i再加-es | 读/z/ | study- studies |
5.不规则变化have和be动词 | 变have 为 has 变be为 am，is， are | - | have-has be-am， is，are |
1
一般疑问句变法：
1.对于谓语动词或助动词是 be、can/may/must 等，将这些词移到主语前面。
We are students.
Are you students？
Yes，we are. / No，we aren't.
你们是学生吗？是的。我们是一名学生。
/不，我们不是。
Jane is in the classroom.
Is Jane in the classroom?
Yes，she is. / No，she isn't.
简在这个教室里面吗？是的，她在。
/不，她不在。
I can swim.
Can you swim?
Yes，I can. / No，I can't.
你会游泳吗？是的，我会。
/不，我不会。
2.谓语动词是实义动词，在主语前加助动词do或does构成，句中动词要改用原型动词。do用于第一人称和名词复数，does用于第三人称单数和名词单数或不可数名词。
I know it.
Do you know it？
Yes，I do. / No，I don't.
你知道这个吗？是的，我知道/不，我不知道。
She has a pen.
Does she have a pen？
Yes，she does. / No，she doesn't.
她有一个钢笔吗？
是的，她有。/不，她没有。
They play basketball after school.
Do they play basketball after school?
Yes，they do. / No，they don't.
他们放学后打篮球吗？
是的，他们打。/不，他们不打。
2
否定句变法：
1.在be、can/may/must 等词后面加not.
I am not at college.
我不在上大学。
Mr. Wang isn't 50 years old.
王先生不是50岁。
You can not go now.
你现在不能去了.
2.谓语动词是实义动词，是在谓语动词前加do not 或does not，谓语动词改用动词原型。
I don't have lunch at home.
我在家没有吃午餐。
They don't play basketball on the sportsground.
他们不在运动场上打篮球。
Mr.Jimmy doesn't know French.
吉米先生不会法语。
push _______ feel _________ finish ______
guess _______ fix _______ go ________
练习一答案：写出下列句子的否定式、疑问式、肯定、否定回答！
1. There are some boys here.
There aren't any boys here.
Are there any boys here?
Yes, there are./No, there aren't.
2. He has a book.
He doesn't have a book.
Does he have a book?
Yes, he does./No, he doesn't.
3. He studies English.
He doesn't study English.
Does he study English?
Yes, he does./No, he doesn't.
4. I do my best.
I don't do my best.
Do you do your best?
Yes, I do./No, I don't.
5. She does her best.
She doesn't do her best.
Does she do her best?
Yes, she does./No, she doesn't.
练习二：写出下列动词的单数第三人称形式：
push -pushes feel -feels finish -finishes
guess -guesses fix -fixes go -goes
do -does have -has try -tries
study -studies carry -carries say -says
cry -cries pay -pays buy -buys
enjoy -enjoys play -plays watch -watches
