为什么if you do,you’ll be sorry有be?而if you do,you’ll have a goo

I won't do my homework.A.if you do that,you'll be sorry.B If If you do exercise r______,you'll be much healthy. You'll be sorry. you shouldn't worry about them.if you do ,you'll not be a___ —Do you mind if you give Tom a hand?Yes,I do.I'll be glad to 一道简单填空题If you set your mind ____(do)it,you'll be successful you'll be able to dress more _______at the weekend if you do do you have any work to do?if any,i'll be of —————— If you need me,i'll be If you do not go after what you want,you'll never have it.If Do you believe if I'll like you`ll be late if you don`t hurry?you·ll be late ()you hurry