Помогите пожалуйста с английским

2.if weather be good we will go to picnic tomorrow.
3.if he miss a buss he late for school
4.if she has a toothache she will go to dentist.
5.if you wont stop jumping you hit your head.
6.
7.if they eat sweets all day they will be fat
8.if you mix yellow and white you will get green.
9.if John be here he will help us.
10.if you add sugar to coffee it will be sweet.