Help Me Please

[SPACEDOUT66]

Do the sentences below contain a bare infinitive or no infinitive at at all

1 I like doing something different every year.
2 Could you help me load the car please.
3 I want some exercise next week.
4 What Mark did was give all his money away.

I think sentences two and four contain a bare infinitive where-as sentences one and three do not.

Is this correct, and if not why not

Thanks

Lloyd

[Tdol]

I agree- #1 has a gerund and 3 is the simple present.