1. Nam spent more money than Minh.
⇒ Minh spent less money than Nam.
2. How long is the River Hong ?
⇒ What's the length of the River Hong ?
3. Are you going to plant more trees in that region.
⇒ Are you trees going to be planted more in that region.
4. I'm very sad that I wasn't accepted in that group.
⇒ I'm very sad not to be accepted in that group.