По-мойму в каждом предложении есть грамматические ошибки и в правописании 1) Someone may get into the house, if he doesn't forget to lock the door 2) He must be more careful, unless he wants to would trouble 3)What will you do if you fail the test? 4)Where will you go if you are free on Sunday?- Непонятно мне, тут спрашивается про совет или конкретное действие в будущем 5) They would pay him if he had finished his work.