Why do we use singular verb in sentences like this:
Just sitting here and watching the world go by. (not goes)
Just sitting here and watching paint dry. (not dries)
The world goes, doesn't it?
Because the world and the paint aren't the subjects of the sentences, which means there's not a fixed point in time when the world goes or the paint dries. Consider this sentence:
The clock ticks
The clock is the subject, so we conjugate "to tick" into the present simple. However if the clock is not the subject, then the verb "to tick" doesn't get conjugated:
Electricity makes the clock tick
This is because the ticking doesn't just happen in the present tense, the electricity gives the clock the ability to tick, which is why we use the infinitive.