will go to see you when you finish the training course这句话的语法,为什么用finish,而不用别的形式呢？比如will finish,will have finished,are finishing

will go to see you when you finish the training course这句话的语法,
为什么用finish,而不用别的形式呢？比如will finish,will have finished,are finishing

这句话联系到了动词的一般将来时的用法,给你点关于一般将来时的语法简讲：
一般将来时
1) shall用于第一人称,常被will 所代替.
will 在陈述句中用于各人称,在争求意见时常用于第二人称.
Which paragraph shall I read first.
Will you be at home at seven this evening?
2) be going to +不定式,表示将来.
a. 主语的意图,即将做某事.
What are you going to do tomorrow?
b. 计划,安排要发生的事.
The play is going to be produced next month.
c. 有迹象要发生的事
Look at the dark clouds, there is going to be a storm.
3) be +不定式表将来,按计划或正式安排将发生的事.
We are to discuss the report next Saturday.
4) be about to +不定式,意为马上做某事.
He is about to leave for Beijing.
注意：be about to 不能与tomorrow, next week 等表示明确将来时的时间状语连用.
----------------------------------------------------------------------用finish因为一般将来时的句式是主句用一般将来时,而从句用现在时!
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当你训练课程结束后我就会去找你

I will go to see you when...
结构:(主句)when(时间状语从句)
主句结构:
I will go to see you...
主语S: I
谓语V: will go to see(一般将来时+动词不定式)
宾语O: you

当你课程结束后我会去找你