When will be the last day
 

My sentence:

-When will be the last day I will see/will be seeing/am seeing/see you?

Which tense can be used and which wrong?

I am not sure, because it does not sound right to have many WILLs in one single sentence, and my teacher told me this is wrong:

-He would follow me wherever I would go.

Because we can't have two WOULDs, do you agree?

I disagree. You can use more than one 'will' and more than one 'would' in a sentence.

When will be the last day I'll see you?
When will be the last day I'll be seeing you?
When will be the last day I see you?
All good. Note the contractions.

When will be the last day I'm seeing you?
A bit awkward, but good. Note the contraction.


He would follow me wherever I would go.
Perfect. And you can use contractions.

He'd follow me wherever I'd go.

Thank you~ But I know that in English, grammar might change because of negativity or interrogation. Does your answer mean the following, which is the question type, is possible?

-Would you follow me wherever I would go/went?

Would you follow me wherever I go would be the way I would say it. However, would you follow me wherever I would go is certainly grammatically correct. The use of went, in this case is bad English.

Also possible:
Would you follow me wherever I (might/may) go?

Thank you~