Giúp em vs ạ, em đang rất rất cần

`26`. If he hadn't failed his final examination, his parents wouldn't have been very disappointed.

`28`. If she had explained him the situation, he would have understood it.

`29`. If my husband had left the car keys, I could have picked him up at the station.

`30`. If we had had enough money, we would have gone on holiday.

`-----`

`***` Câu điều kiện loại `3`: Không thể xảy ra ở quá khứ 

`->` If + S + had + V3/ed, S + would/could/might + have + V3/ed