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