they went home when they had spent all their money,为什么这里用whe

when表示同时发生,或有先后.
所有有时“when”可以换成“after”或"before"
是的,一般结构是：had done sth...when...did
但when的结构是灵活的,既可以将had done作为主句,
可也以将did作为主句.所以：
had done sth...when...did = did ...when had done sth...
e.g.They went home when they had spent all their money
=They had spent all their money when they went home.
如果有疑问,欢迎追问,
如果有,请记得及时采纳哦,亲…….

这里是由 when引导的一个状语从句，当然不能用after了

他们花完了所有的钱之后回家了

They went home when they had spent all their money,为什么这里用when不用after呢？
我觉得：They went home when they had spent all their money,=They went home after they had spent all their money,
因为had spent的时态就比went先，你说是吗？