I know the English word flatter is a transitive one.
He is flattering (someone).
I am flattered. OK
Are my sentences correct? There is no object!
Please tell me.
I agree.flattering can be used as present participle which also doesn't take an object.
You might say:
His interest was flattering.
This is flattering.
I agree.
He/she is flattering.
They are flattering.
So the above sentences are incorrect.
He/she is flattered.
They are flattered. []right]
The following are correct ones
He/she is flattering other people/his friends.
They are flattering other people/their friends.