Are you going to study tonight? (need)
Yes, I need to.
Can you take me shopping later? (be happy)
Sure, I'd be happy to.
Have you ever travelled to another country? (like)
No, but I'd like to.
Do you think you'll pass the next exam? (hope)
I hope to.
Are you going to the Back Street Boys concert? (decided not)
No, I decided not to.
Have you ever visited the US? (plan)
No, but I plan to.
Do you want to go get some coffee? (prefer not)
No, I'd prefer not to.
Would you like to try to skydive? (be afraid)
No, I'm afraid to.
Do you think we will get off early? (not expect)
I don't expect to.
Did you learn the piano when you were young? (try)
No, but I tried to.
Are you and your family moving out of the city? (like)
We'd like to.
Are you going to school tomorrow? (plan)
I plan to.