1.He is Tom.(变为否定句He isn't Tom.疑问句Is he Tom?)
2.That's a computer.(变为疑问句Is that a computer?并作肯定回答Yes ,it is)
3.He is a boy.(变为复数形式They are boys.)
1.He is Tom.(变为否定句He isn't Tom.疑问句Is he Tom?)
2.That's a computer.(变为疑问句Is that a computer?并作肯定回答Yes ,it is)
3.He is a boy.(变为复数形式They are boys.)