English verb conjugation
COULD ROUND

Regular verb: round - rounded - rounded

Affirmation

Simple form	V-ing form
I could round you could round he could round we could round you could round they could round	I could be rounding you could be rounding he could be rounding we could be rounding you could be rounding they could be rounding
Perfect	V-ing perfect
I could have rounded you could have rounded he could have rounded we could have rounded you could have rounded they could have rounded	I could have been rounding you could have been rounding he could have been rounding we could have been rounding you could have been rounding they could have been rounding

Negation

Simple form	V-ing form
I could not round you could not round he could not round we could not round you could not round they could not round	I could not be rounding you could not be rounding he could not be rounding we could not be rounding you could not be rounding they could not be rounding
Perfect	V-ing perfect
I could not have rounded you could not have rounded he could not have rounded we could not have rounded you could not have rounded they could not have rounded	I could not have been rounding you could not have been rounding he could not have been rounding we could not have been rounding you could not have been rounding they could not have been rounding

Interrogative form

Simple form	V-ing form
could I round? could you round? could he round? could we round? could you round? could they round?	could I be rounding? could you be rounding? could he be rounding? could we be rounding? could you be rounding? could they be rounding?
Perfect	V-ing perfect
could I have rounded? could you have rounded? could he have rounded? could we have rounded? could you have rounded? could they have rounded?	could I have been rounding? could you have been rounding? could he have been rounding? could we have been rounding? could you have been rounding? could they have been rounding?

Interro-negative form

Simple form	V-ing form
could I not round? could you not round? could he not round? could we not round? could you not round? could they not round?	could I not be rounding? could you not be rounding? could he not be rounding? could we not be rounding? could you not be rounding? could they not be rounding?
Perfect	V-ing perfect
could I not have rounded? could you not have rounded? could he not have rounded? could we not have rounded? could you not have rounded? could they not have rounded?	could I not have been rounding? could you not have been rounding? could he not have been rounding? could we not have been rounding? could you not have been rounding? could they not have been rounding?