He won’t buy/ doesn’t will buy you this ring. it’s too expensive

i not will help/ won’t help you with your work. do it yourself!

i think they will to hire/ will hire you. when they will tell/ telling you their decision?

how old you will be/ will you be?
слелайте хотя бы последнее, а то я только это не сделал 30
нужно выбрать правильный глагол​