can I use 'would' word in a conditions apply sentences ? as: तुम बाहर तभी जा सकते हो जब तुम अपना काम पूरा कर लोगे. please answer me.

"if you will finish your work than you would go outside." yes, we can use of would in conditional sentences and to express past habit and wish and in request sentences.

you go outside then you complete your all work