Viết lại câu với mệnh đề if

1 Study hard and you'll be successful
- If ......................................................
2 Stop talking or I'll ask you out
-If................................................
3 Work harder or you will fail the exam 
-If...........................................................
4 Because I can't speak English, they don't employ me
-If.....................................................................................
5 Thanks to her help, we can do our work more effectively
-If.........................................................................................