Rewrite the following 1 they didn't sell the house because their children wanted to keep it 2 mrs.white fell down because she was too weak 3 she couldn't come because she had to work overtime

1, If their children hadn't wanted to keep the house, they would have sold it

2, If Mrs. White hadn't been too weak, she wouldn't have fallen down

3, If she hadn't had to work overtime, she could have come

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Câu đk loại 3:

$If + S + Had + V(pp)/Ved, S + would/ could…+ have + V(pp)/Ved$