肯定句 I am happy.He is a worker.You are students.
否定句 I am not happy.He is not a worker.You are not students.
一般疑问句 Am I happy?Is he a worlker?Are you students?
肯定句 I am happy.He is a worker.You are students.
否定句 I am not happy.He is not a worker.You are not students.
一般疑问句 Am I happy?Is he a worlker?Are you students?