1. Although I was very sleepy, I still wanted to watch the football match on TV.
`=>` Although + S + V: mặc dù, but: nhưng
2. John asked Mary if she knew what the time was.
`=>` Câu trần thuật yes, no: S + asked + O + if + S2 + V lùi thì
3. Jane hasn't visited Vietnam before.
`=>` This is the first time + S + have/has + Vpp = S + have/has + not + Vpp + before.
4. My mother wishes she didn't live in such a small house.
`=>` Câu trần thuật nên lùi thì