ing or no ing

[carly_tura]

hi. can you please tell me whether the following sentence is correct?
He felt his lips stretching into a smile.
is it stretching or stretch?
thank you.

 

[Mannysteps]

Not a teacher

I believe both are fine.

M.

 

[casablanca_30391]

hi. can you please tell me whether the following sentence is correct?
He felt his lips stretching into a smile.
is it stretching or stretch?
thank you.

The first one is correct, I think so

 

[5jj]

The first one is correct, I think so

Both are fine, as Mannysteps wrote.