Светик11111111111 1. If he had a problem, he would speak to the teacher
дальше по такому же принципу в части где if глагол ставь в соответствии со временем, а в другой части ставь would+глагол, который там

altuninakoshka 1.If he has a problem he speaks to the teacher
2.If my hand hurt tomorrow I will go to the doctor
3.If he miss the bus he will not be happy
4.If my sister go to music lessons my mum will buy her a guitar
5.If you see the film tomorrow you will know the story end
6.The teacher will give me a bad mark if i not give her my homework
7.You will not see me if you come late
8.If you not switch off your mobile phone people will get angry
9.The picnic will be a disaster if the weather is bad
10.If we not go to the shops we will not have enough food