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 couldn't round you couldn't round he couldn't round we couldn't round you couldn't round they couldn't round	I couldn't be rounding you couldn't be rounding he couldn't be rounding we couldn't be rounding you couldn't be rounding they couldn't be rounding
Perfect	V-ing perfect
I couldn't have rounded you couldn't have rounded he couldn't have rounded we couldn't have rounded you couldn't have rounded they couldn't have rounded	I couldn't have been rounding you couldn't have been rounding he couldn't have been rounding we couldn't have been rounding you couldn't have been rounding they couldn't 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
couldn't I round? couldn't you round? couldn't he round? couldn't we round? couldn't you round? couldn't they round?	couldn't I be rounding? couldn't you be rounding? couldn't he be rounding? couldn't we be rounding? couldn't you be rounding? couldn't they be rounding?
Perfect	V-ing perfect
couldn't I have rounded? couldn't you have rounded? couldn't he have rounded? couldn't we have rounded? couldn't you have rounded? couldn't they have rounded?	couldn't I have been rounding? couldn't you have been rounding? couldn't he have been rounding? couldn't we have been rounding? couldn't you have been rounding? couldn't they have been rounding?