It's陈述句肯定句，否定句，一般疑问句思维导图

陈述句肯定句：It's a book.

变否定句：It isn't a book.

变一般疑问句：Is it a book? 肯定回答：Yes，it is. 否定回答：No, it isn't.

陈述句肯定句：It's a ball.

变否定句：It isn't a ball.

变一般疑问句：Is it a ball? 肯定回答：Yes，it is. 否定回答：No, it isn't.

陈述句肯定句：It's a kite.

变否定句：It isn't a kite.

变一般疑问句：Is it a kite? 肯定回答：Yes，it is. 否定回答：No, it isn't.

陈述句肯定句：It's an eraser.

变否定句：It isn't an eraser.

变一般疑问句：Is it an eraser? 肯定回答：Yes，it is. 否定回答：No, it isn't.

陈述句肯定句：It's a doll.

变否定句：It isn't a doll.

变一般疑问句：Is it a doll? 肯定回答：Yes，it is. 否定回答：No, it isn't.

陈述句肯定句：It's a train.

变否定句：It isn't a train.

变一般疑问句：Is it a train? 肯定回答：Yes，it is. 否定回答：No, it isn't.

陈述句肯定句：It's twelve.

变否定句：It isn't twelve.

变一般疑问句：Is it twelve? 肯定回答：Yes，it is. 否定回答：No, it isn't.

陈述句肯定句：It's a car.

变否定句：It isn't a car.

变一般疑问句：Is it a car? 肯定回答：Yes，it is. 否定回答：No, it isn't.