English verb conjugation
COULD INVITE

Regular verb: invite - invited - invited

Affirmation

Simple form	V-ing form
I could invite you could invite he could invite we could invite you could invite they could invite	I could be inviting you could be inviting he 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 he 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 he 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 he 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 he 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 he 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 he 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 he invite? could we invite? could you invite? could they invite?	could I be inviting? could you be inviting? could he 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 he 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 he 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 he 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 he 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 he 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 he have been inviting? couldn't we have been inviting? couldn't you have been inviting? couldn't they have been inviting?