判断下列句子是否正确,不对的改正（英语题）
问题描述：
判断下列句子是否正确,不对的改正（英语题）
Has he sell his old car?
Mr.Smith has always been a good teacher.
He has been several countries.
Jim returned to home at nine o'clock last night.
You'd better comes bake before ten o'clock.
答
第一句：sell改sold,因为是已经完成时
第二句：always去掉,因为always是一个持续的状态
第三句：been改成gone to,因为been是一个状态,是不能代表去过
第四句：to去掉,因为Home前是不能加介词的
第五句：comes改成come,因为有这么一个词组had better do sth