What is the difference between these two sentences?
1. I sat sipping at my coffee.
2. I sat sipping my coffee.

Btw, how do we grammatically understand the verb 'sat' follows "sipping"?

Thanks for your help.

Question

What is the difference between these two sentences?
1. I sat sipping at my coffee.
2. I sat sipping my coffee.

Btw, how do we grammatically understand the verb 'sat' follows "sipping"?

Thanks for your help.

Answer

Hi, both of those are good.

'Sipping at' a drink sounds a bit more descriptive, than just 'sipping' it, so is more likely to be found in a novel than in normal usage, but they both mean exactly the same thing.

I'm guessing the second part of your question is that you'd like to know how to re-word things to put 'sat' after 'sipping'.
If I''m right about that, it's doable but doesn't sound/read quite as good.

I sipped my coffee while sitting.

You could also use 'sipped at' instead of 'sipped'.
You could also use 'as I sat' instead of 'while sitting'.