`1.` If I had taken a painkiller, my headache would have gone away.

`2.` Emma would not have had to walk to school if she had caught the bus.

`-` Câu ngữ cảnh dùng thì QKD `->` Dùng câu điều kiện loại `2`

`-` Structure: If `+` S `+` had `+` Vpp, S `+` would `+` have `+` Vpp.

`3.` I suggest buying energy-saving bulbs.

`-` What/How about `+` Ving`?`

`=` suggest `+` Ving: gợi ý làm gì

`1. `If I had taken a painkiller, my headache would have gone away.

`2. `Emma would have caught the bus if she hadn't missed it.

`----------------`

`-` Câu 1 + 2 : Câu điều kiện không có thực trong quá khứ.

`-`If + S + had + Vpp/V-ed,S  + would/could/might + have + Vpp/V-ed ..

`3.` I suggest buying energy-saving bulbs.

`-`  suggest + Ving : đề nghị làm việc gì

`-`Tôi đề nghị mua bóng đèn tiết kiệm năng lượng.