have spent 和 had spent 有什么区别、//?
have spent 和 had spent 有什么区别、//?
spent on 与spent in 有什么区别?
having spent/have spent 的区别
they spent和they have spent
pay,cost,spent,take有什么区别
They have spent all theymoney."have spent"能换成"had spent"吗?
i have had和 i had had 有什么区别?
spent和spend的用法,区别
cost 与spent等一系列词有什么区别?语法上
have gone和had go有什么区别
have和had在现在完成时中有什么区别
had been和have been有什么区别?请举例