English verb conjugation
COULD AID

Regular verb: aid - aided - aided

Affirmation

Simple form	V-ing form
I could aid you could aid she could aid we could aid you could aid they could aid	I could be aiding you could be aiding she could be aiding we could be aiding you could be aiding they could be aiding
Perfect	V-ing perfect
I could have aided you could have aided she could have aided we could have aided you could have aided they could have aided	I could have been aiding you could have been aiding she could have been aiding we could have been aiding you could have been aiding they could have been aiding

Negation

Simple form	V-ing form
I couldn't aid you couldn't aid she couldn't aid we couldn't aid you couldn't aid they couldn't aid	I couldn't be aiding you couldn't be aiding she couldn't be aiding we couldn't be aiding you couldn't be aiding they couldn't be aiding
Perfect	V-ing perfect
I couldn't have aided you couldn't have aided she couldn't have aided we couldn't have aided you couldn't have aided they couldn't have aided	I couldn't have been aiding you couldn't have been aiding she couldn't have been aiding we couldn't have been aiding you couldn't have been aiding they couldn't have been aiding

Interrogative form

Simple form	V-ing form
could I aid? could you aid? could she aid? could we aid? could you aid? could they aid?	could I be aiding? could you be aiding? could she be aiding? could we be aiding? could you be aiding? could they be aiding?
Perfect	V-ing perfect
could I have aided? could you have aided? could she have aided? could we have aided? could you have aided? could they have aided?	could I have been aiding? could you have been aiding? could she have been aiding? could we have been aiding? could you have been aiding? could they have been aiding?

Interro-negative form

Simple form	V-ing form
couldn't I aid? couldn't you aid? couldn't she aid? couldn't we aid? couldn't you aid? couldn't they aid?	couldn't I be aiding? couldn't you be aiding? couldn't she be aiding? couldn't we be aiding? couldn't you be aiding? couldn't they be aiding?
Perfect	V-ing perfect
couldn't I have aided? couldn't you have aided? couldn't she have aided? couldn't we have aided? couldn't you have aided? couldn't they have aided?	couldn't I have been aiding? couldn't you have been aiding? couldn't she have been aiding? couldn't we have been aiding? couldn't you have been aiding? couldn't they have been aiding?