He/She
Does Jimmy need to study?
Do you like to play chess?
I do like to play chess.
Do we have a test today?
We do have a test today.
I'm not sure if he drives.
He does drive (he even has a car).
But do you see what I mean?
I do see what you mean.
They look like they don't know how to swim.
But they do know how to swim!
Did he think his promotion was warranted?
He did think so.
You looked like you didn't enjoy the movie.
No, I did enjoy the movie.
Do we have to be careful?
We do have to be very careful.
Does she believe you can achieve your goal?
She does believe I can achieve my goal. I got this!
Did you really do your homework?
I did do it.
But do they have an advantage because of it?
They certainly do have an advantage because of it.
He has been fishing every day of the week.
He really does like fishing!
I feel like you thought my argument was invalid.
I did think your argument was invalid.
Did they find the solution in the end?
They did find the solution in the end.