`1.` We don't know where to put the sofa.

`2.` The rules didn't specify who to speak to in case of an emergency.

`3.` Mai wondered how to ride the scooter.

`4.` Let us decide when to start the project.

`5.` Could you tell me where to find a good hotel`?`

`6.` We must find out what to do next.

`7.` A good dictionary tells you how to pronounce the words.

`8.` We are not sure who to meet at the entrance.

`9.` I can't remember when to turn off the oven.

`10.` Do you know what to look for`?`

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

`-` Cấu trúc: Wh-question words `+` to V-inf `:`

`->` S `+` V `+` W-questions `+` S `+` V

`=` S `+` V `+` Wh-questions `+` to V

`color{red}{#lgdr}`

`1` We don't know where to put the sofa .

`2` The rules didn't specify who to speak to in case of an emergency .

`3` Mai wondered how to ride the scooter .

`4` Let us decide when to start the project .

`5` Could you tell me where to find a good hotel `?`

`6` We must find out what to do next .

`7` A good dictionary tells you how to pronounce the words .

`8` We are not sure who to meet at the entrance .

`9` I can't remember when to turn off the oven .

`10` Do you know what to look for `?`

`@` Cấu trúc dạng ''Wh_question + to V'' :
`-` S + V(chia) + O + Wh_question + S + V(chia) + O ...

`=>` S + V(chia) + O + Wh_question + to V + O ...