Choose 3 grammatically correct sentences: 1) if i will see john, i invite him. 2) if you are cold, you should put on a warm coat. 3) if the weather is nice tomorrow, i will go to the park. 4) if my mum lets me, i will start swimming lessons. 5) i dont go to school tomorrow if i will feel ba. 6) liz will give me her book if she will read it.