+0
If you were sure he (?) come, I would......

this question is about tense usage in subordinate clauses in conditional sentences.

I know we have to change the tense in the main clause into past when we refer to something unreal or something theoretical

what I want to know is the tense in subordinate clauses, not in the main clauses

which tense should I use in the sentence above when I want to refer to something in the future?

1. If you were sure he came, I would......
2. If you were sure he will come, I would...
3. If you were sure he would come, I would...
1 2 3
Comments  (Page 3) 
interesting. I never expected my question would be so controversial.
more opinions would be appreciated.