sick/ill

[Allifathima]

1. He is sick.
1a. He feel sick.
1b. He has fallen sick.
2. He is ill.
2a. He feel ill.
2b. He has fallen ill.
Please correct the above sentences.

[Beeesneees]

He is sick.
He feels sick.
He has fallen sick.
He is ill.
He feels ill.
He has fallen ill.
_________________
Cheers m' dears!