English verb conjugation
COULD AID

Regular verb: aid - aided - aided

Affirmation

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