any one of them/whichever of them

[navi tasan]

Are these sentences correct:

1) Any one of them who finishes their work on time will get a raise.
2) Whichever of them who finishes their work on time will get a raise.

3) Whichever ones of them who finishes their work on time will get a raise.
4) Whichever one of them who finishes their work on time will get a raise.

Which could be used if the speaker thinks it is possible that more than one of them will finish their work on time?

 

[tedmc]

How about:

Whoever finish their work on time will get a raise?

I think the use of their implies there could be more than one person.

 

[Glizdka]

Whoever, whichever, and whatever, as well as everyone and everything, are all grammatically singular.

"Whoever finishes their work on time will get a raise."

If you really want something plural, this might work for you:

"Those who finish their work on time will get a raise."

 

[Tarheel]

To answer your original question:

Yes, but they are rather awkward and unnatural.