worried

[Taka]

Which is grammatically correct? Or are these both equally natural?

What he is worried about most is the police coming to arrest him.
What he is most worried about is the police coming to arrest him.

 

[Raymott]

Which is grammatically correct? Or are these both equally natural?

What he is worried about most is the police coming to arrest him.
What he is most worried about is the police coming to arrest him.

They're both good.

 

[Taka]

Then what about these? Do they both sound natural?

What worries him most is the police coming to arrest him.
What most worries him is the police coming to arrest him.

 

[Barb_D]

Fine.