else as conditional

[Mr. X]

Hello,

Is else used as a conditional? He agreed to the proposal. Else, he should only have suffered.

Is this right - should have because it is past tense?

Mr. X

[bhaisahab]

Hello,

Is else used as a conditional? He agreed to the proposal. Else, he should only have suffered.

Is this right - should have because it is past tense?

Mr. X

It's technically correct, but it would be only rarely used. "Have" is correct because of "should".