Rewrite the following sentences

rewrite the following sentences
1 be good or your parents will be very unhappy.
if .................................................................................
2 do it carefully or you'll feel sorry sfterwards.
if ..........................................................................
3 ask him first and he will offer to help.
if ................................................................
4 be calm or you'll make a wrong decision.
if ....................................................................
5 be careful or you'll cut yourself with that knife.
if .............................................................................