People ___________ contribute more if they _______ more time.

People ___________ contribute more if they _______ more time.

Explanation

This sentence belongs to Type Two conditional sentence (unreal situation)

We use would and had in the second type of Conditional sentences. 

People would contribute more if they had more time means لوگوں کے پاس زیادہ پیسہ ہوتا تو چندہ دیتے 


AGM 24-12-2022