English verb conjugation
COULD SPHERE

Regular verb: sphere - sphered - sphered

Affirmation

Simple form	V-ing form
I could sphere you could sphere he could sphere we could sphere you could sphere they could sphere	I could be sphering you could be sphering he could be sphering we could be sphering you could be sphering they could be sphering
Perfect	V-ing perfect
I could have sphered you could have sphered he could have sphered we could have sphered you could have sphered they could have sphered	I could have been sphering you could have been sphering he could have been sphering we could have been sphering you could have been sphering they could have been sphering

Negation

Simple form	V-ing form
I could not sphere you could not sphere he could not sphere we could not sphere you could not sphere they could not sphere	I could not be sphering you could not be sphering he could not be sphering we could not be sphering you could not be sphering they could not be sphering
Perfect	V-ing perfect
I could not have sphered you could not have sphered he could not have sphered we could not have sphered you could not have sphered they could not have sphered	I could not have been sphering you could not have been sphering he could not have been sphering we could not have been sphering you could not have been sphering they could not have been sphering

Interrogative form

Simple form	V-ing form
could I sphere? could you sphere? could he sphere? could we sphere? could you sphere? could they sphere?	could I be sphering? could you be sphering? could he be sphering? could we be sphering? could you be sphering? could they be sphering?
Perfect	V-ing perfect
could I have sphered? could you have sphered? could he have sphered? could we have sphered? could you have sphered? could they have sphered?	could I have been sphering? could you have been sphering? could he have been sphering? could we have been sphering? could you have been sphering? could they have been sphering?

Interro-negative form

Simple form	V-ing form
could I not sphere? could you not sphere? could he not sphere? could we not sphere? could you not sphere? could they not sphere?	could I not be sphering? could you not be sphering? could he not be sphering? could we not be sphering? could you not be sphering? could they not be sphering?
Perfect	V-ing perfect
could I not have sphered? could you not have sphered? could he not have sphered? could we not have sphered? could you not have sphered? could they not have sphered?	could I not have been sphering? could you not have been sphering? could he not have been sphering? could we not have been sphering? could you not have been sphering? could they not have been sphering?