mention some expressions of giving suggestion

You should colouring your picture so it can be more beautiful
I recommend you to wash your face after you go home from school
Maybe you should ask some dispentation to your school
I'm certain you can get a better mark in this time because you have already study hard
You had better say sorry to him/ you had better say your apologize to him
semoga membantu kk..
maaf kalau salah..