john has been to the usa a few times 改为一般疑问句

john has been to the usa a few times 改为一般疑问句 he has never been to the USA 改为反意疑问句he has never been to the Dave takes the train a few times every month (改为一般疑问句） He has been to Beijing three times.转换一般疑问句 john has been to the USA twice,对划线部分提问 划the USA john has a nice dog改为一般疑问句 John has a ping-pong bat.改为一般疑问句 John has a nice dog.（改为一般疑问句） He's never been to the USA.(改为反义疑问句) He's never been to the Jack's father has a_______ been to the USA many times mike has already been to thebotanical gardens改为一般疑问句 My friend Jimmy has been to the Great Wall before(改为一般疑问句）