English verb conjugation
COULD DELIVER

Regular verb: deliver - delivered - delivered

Affirmation

Simple form	V-ing form
I could deliver you could deliver he could deliver we could deliver you could deliver they could deliver	I could be delivering you could be delivering he could be delivering we could be delivering you could be delivering they could be delivering
Perfect	V-ing perfect
I could have delivered you could have delivered he could have delivered we could have delivered you could have delivered they could have delivered	I could have been delivering you could have been delivering he could have been delivering we could have been delivering you could have been delivering they could have been delivering

Negation

Simple form	V-ing form
I couldn't deliver you couldn't deliver he couldn't deliver we couldn't deliver you couldn't deliver they couldn't deliver	I couldn't be delivering you couldn't be delivering he couldn't be delivering we couldn't be delivering you couldn't be delivering they couldn't be delivering
Perfect	V-ing perfect
I couldn't have delivered you couldn't have delivered he couldn't have delivered we couldn't have delivered you couldn't have delivered they couldn't have delivered	I couldn't have been delivering you couldn't have been delivering he couldn't have been delivering we couldn't have been delivering you couldn't have been delivering they couldn't have been delivering

Interrogative form

Simple form	V-ing form
could I deliver? could you deliver? could he deliver? could we deliver? could you deliver? could they deliver?	could I be delivering? could you be delivering? could he be delivering? could we be delivering? could you be delivering? could they be delivering?
Perfect	V-ing perfect
could I have delivered? could you have delivered? could he have delivered? could we have delivered? could you have delivered? could they have delivered?	could I have been delivering? could you have been delivering? could he have been delivering? could we have been delivering? could you have been delivering? could they have been delivering?

Interro-negative form

Simple form	V-ing form
couldn't I deliver? couldn't you deliver? couldn't he deliver? couldn't we deliver? couldn't you deliver? couldn't they deliver?	couldn't I be delivering? couldn't you be delivering? couldn't he be delivering? couldn't we be delivering? couldn't you be delivering? couldn't they be delivering?
Perfect	V-ing perfect
couldn't I have delivered? couldn't you have delivered? couldn't he have delivered? couldn't we have delivered? couldn't you have delivered? couldn't they have delivered?	couldn't I have been delivering? couldn't you have been delivering? couldn't he have been delivering? couldn't we have been delivering? couldn't you have been delivering? couldn't they have been delivering?