`9.` had not frozen `-` would have gone

`-` Câu điều kiện loại 3:

If +  S + had + V3/ed + O, S +  would/could + have + V3/ed + O

`->` Diễn tả giả thiết không có thật trong quá khứ.

If the river had not frozen, my friends and I would have gone skating last weekend.

`***` Cấu trúc

If `+` `S` `+` had `+` `V3``/``V-ed,` `S` `+` would have `+` `V3``/``V-ed`

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