English verb conjugation
COULD BLUB

Regular verb: blub - blubed - blubed

Affirmation

Simple form	V-ing form
I could blub you could blub he could blub we could blub you could blub they could blub	I could be blubing you could be blubing he could be blubing we could be blubing you could be blubing they could be blubing
Perfect	V-ing perfect
I could have blubed you could have blubed he could have blubed we could have blubed you could have blubed they could have blubed	I could have been blubing you could have been blubing he could have been blubing we could have been blubing you could have been blubing they could have been blubing

Negation

Simple form	V-ing form
I could not blub you could not blub he could not blub we could not blub you could not blub they could not blub	I could not be blubing you could not be blubing he could not be blubing we could not be blubing you could not be blubing they could not be blubing
Perfect	V-ing perfect
I could not have blubed you could not have blubed he could not have blubed we could not have blubed you could not have blubed they could not have blubed	I could not have been blubing you could not have been blubing he could not have been blubing we could not have been blubing you could not have been blubing they could not have been blubing

Interrogative form

Simple form	V-ing form
could I blub? could you blub? could he blub? could we blub? could you blub? could they blub?	could I be blubing? could you be blubing? could he be blubing? could we be blubing? could you be blubing? could they be blubing?
Perfect	V-ing perfect
could I have blubed? could you have blubed? could he have blubed? could we have blubed? could you have blubed? could they have blubed?	could I have been blubing? could you have been blubing? could he have been blubing? could we have been blubing? could you have been blubing? could they have been blubing?

Interro-negative form

Simple form	V-ing form
could I not blub? could you not blub? could he not blub? could we not blub? could you not blub? could they not blub?	could I not be blubing? could you not be blubing? could he not be blubing? could we not be blubing? could you not be blubing? could they not be blubing?
Perfect	V-ing perfect
could I not have blubed? could you not have blubed? could he not have blubed? could we not have blubed? could you not have blubed? could they not have blubed?	could I not have been blubing? could you not have been blubing? could he not have been blubing? could we not have been blubing? could you not have been blubing? could they not have been blubing?