Раскройте скобки, поставив глагол в соответствующую форму, используемую в условных предложениях 2 типа:
2.1 If he (not tell) us that himself I would never believe that.
2.2 He never (agree) with you even if he were wrong.
2.3 She would be pleased if my mother (allow) me to spend a month with them.
2.4 Mary is staying with them. I think it (be) a good thing if you came and saw her.
2.5 You wouldn’t find the house even if you (ask) for directions: it has been pulled out recently.