English verb conjugation
COULD INVITE

Regular verb: invite - invited - invited

Affirmation

Simple form	V-ing form
I could invite you could invite she could invite we could invite you could invite they could invite	I could be inviting you could be inviting she could be inviting we could be inviting you could be inviting they could be inviting
Perfect	V-ing perfect
I could have invited you could have invited she could have invited we could have invited you could have invited they could have invited	I could have been inviting you could have been inviting she could have been inviting we could have been inviting you could have been inviting they could have been inviting

Negation

Simple form	V-ing form
I couldn't invite you couldn't invite she couldn't invite we couldn't invite you couldn't invite they couldn't invite	I couldn't be inviting you couldn't be inviting she couldn't be inviting we couldn't be inviting you couldn't be inviting they couldn't be inviting
Perfect	V-ing perfect
I couldn't have invited you couldn't have invited she couldn't have invited we couldn't have invited you couldn't have invited they couldn't have invited	I couldn't have been inviting you couldn't have been inviting she couldn't have been inviting we couldn't have been inviting you couldn't have been inviting they couldn't have been inviting

Interrogative form

Simple form	V-ing form
could I invite? could you invite? could she invite? could we invite? could you invite? could they invite?	could I be inviting? could you be inviting? could she be inviting? could we be inviting? could you be inviting? could they be inviting?
Perfect	V-ing perfect
could I have invited? could you have invited? could she have invited? could we have invited? could you have invited? could they have invited?	could I have been inviting? could you have been inviting? could she have been inviting? could we have been inviting? could you have been inviting? could they have been inviting?

Interro-negative form

Simple form	V-ing form
couldn't I invite? couldn't you invite? couldn't she invite? couldn't we invite? couldn't you invite? couldn't they invite?	couldn't I be inviting? couldn't you be inviting? couldn't she be inviting? couldn't we be inviting? couldn't you be inviting? couldn't they be inviting?
Perfect	V-ing perfect
couldn't I have invited? couldn't you have invited? couldn't she have invited? couldn't we have invited? couldn't you have invited? couldn't they have invited?	couldn't I have been inviting? couldn't you have been inviting? couldn't she have been inviting? couldn't we have been inviting? couldn't you have been inviting? couldn't they have been inviting?