Which are correct: 1-I don't know if they helped John last night or not, but it would be surprising if they did. 2-I don't know if they helped John last night or not, but it will be surprising if they did.
3-It would be surprising if they helped John last night, but that might be what they did. 4-It will be surprising if they helped John last night, but that might be what they did.
Gratefully, Navi.
Top answer
All are OK.
— Mister Micawber
All are OK.
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