肯定句I'm a student.I read this book.
否定句I'm not a student.I don't read this book.
一般疑问句Are you a student?Do you read this book
.由连系am,is,are构成的句子：变一般疑问句时把am,is,are提到句子的前面,句尾用问号即可.变否定句时直接在am,is,are后面加not即可.例如：
肯定句:He is a student.
一般疑问句:Is he a student?
否定句:He is not a student.
反问句:He is a student,isn't he?
He isn't a student,is he?
画线提问:对he提问:Who is a student?
对 a student 提问:What is he?or What does he do?
2.由情态动词can,may,should等构成的句子:变一般疑问句时把can,may,提到句子的前面,句尾用问号即可.变否定句时直接在can,may,后面加not即可.例如:
肯定句:She can swim.
一般疑问句:Can she swim?
否定句:She can not swim.
反问句:She can swim,can't she?
She can not swim,can she?
画线提问:对she提问:Who can swim?
对swim提问:What can she do?
3.由行为动词构成的句子:需要加助词do或does.变一般疑问句时把do/does放在句子前面.例如:
肯定句:They play football after school.
一般疑问句:Do they play football after school?
否定句:They don't (do not) play football after school.
反问句:They play football after school,don't they?
They don't play football after school,do they?
画线提问:对they提问:Who play football after school?
对play football提问:What do they do after school?
对after school提问:When do they play football?
