Michael is still staring intensely at his laptop.
Under the desk, his feet tapping (the floor) impatiently, showing his growing frustration.
How would you write the bold-face part? Is 'the floor' necessary? And if so, would I need to add a preposition before it?
Could tripping be used instead of tapping in this context?
Thanks.
anonymousUnder the desk, his feet tapping (the floor)impatiently, showing his growing frustration.
anonymousIs 'the floor' necessary?
I would include it.
anonymousAnd if so, would I need to add a preposition before it?
You could use "on", but it is not necessary.
anonymousCould "tripping" be used instead of "tapping" in this context?
No. That has a different meaning.