English verb conjugation
COULD INFORM

Regular verb: inform - informed - informed

Affirmation

Simple form	V-ing form
I could inform you could inform she could inform we could inform you could inform they could inform	I could be informing you could be informing she could be informing we could be informing you could be informing they could be informing
Perfect	V-ing perfect
I could have informed you could have informed she could have informed we could have informed you could have informed they could have informed	I could have been informing you could have been informing she could have been informing we could have been informing you could have been informing they could have been informing

Negation

Simple form	V-ing form
I couldn't inform you couldn't inform she couldn't inform we couldn't inform you couldn't inform they couldn't inform	I couldn't be informing you couldn't be informing she couldn't be informing we couldn't be informing you couldn't be informing they couldn't be informing
Perfect	V-ing perfect
I couldn't have informed you couldn't have informed she couldn't have informed we couldn't have informed you couldn't have informed they couldn't have informed	I couldn't have been informing you couldn't have been informing she couldn't have been informing we couldn't have been informing you couldn't have been informing they couldn't have been informing

Interrogative form

Simple form	V-ing form
could I inform? could you inform? could she inform? could we inform? could you inform? could they inform?	could I be informing? could you be informing? could she be informing? could we be informing? could you be informing? could they be informing?
Perfect	V-ing perfect
could I have informed? could you have informed? could she have informed? could we have informed? could you have informed? could they have informed?	could I have been informing? could you have been informing? could she have been informing? could we have been informing? could you have been informing? could they have been informing?

Interro-negative form

Simple form	V-ing form
couldn't I inform? couldn't you inform? couldn't she inform? couldn't we inform? couldn't you inform? couldn't they inform?	couldn't I be informing? couldn't you be informing? couldn't she be informing? couldn't we be informing? couldn't you be informing? couldn't they be informing?
Perfect	V-ing perfect
couldn't I have informed? couldn't you have informed? couldn't she have informed? couldn't we have informed? couldn't you have informed? couldn't they have informed?	couldn't I have been informing? couldn't you have been informing? couldn't she have been informing? couldn't we have been informing? couldn't you have been informing? couldn't they have been informing?