English verb conjugation
COULD PROPAGATE

Regular verb: propagate - propagated - propagated

Affirmation

Simple form	V-ing form
I could propagate you could propagate he could propagate we could propagate you could propagate they could propagate	I could be propagating you could be propagating he could be propagating we could be propagating you could be propagating they could be propagating
Perfect	V-ing perfect
I could have propagated you could have propagated he could have propagated we could have propagated you could have propagated they could have propagated	I could have been propagating you could have been propagating he could have been propagating we could have been propagating you could have been propagating they could have been propagating

Negation

Simple form	V-ing form
I couldn't propagate you couldn't propagate he couldn't propagate we couldn't propagate you couldn't propagate they couldn't propagate	I couldn't be propagating you couldn't be propagating he couldn't be propagating we couldn't be propagating you couldn't be propagating they couldn't be propagating
Perfect	V-ing perfect
I couldn't have propagated you couldn't have propagated he couldn't have propagated we couldn't have propagated you couldn't have propagated they couldn't have propagated	I couldn't have been propagating you couldn't have been propagating he couldn't have been propagating we couldn't have been propagating you couldn't have been propagating they couldn't have been propagating

Interrogative form

Simple form	V-ing form
could I propagate? could you propagate? could he propagate? could we propagate? could you propagate? could they propagate?	could I be propagating? could you be propagating? could he be propagating? could we be propagating? could you be propagating? could they be propagating?
Perfect	V-ing perfect
could I have propagated? could you have propagated? could he have propagated? could we have propagated? could you have propagated? could they have propagated?	could I have been propagating? could you have been propagating? could he have been propagating? could we have been propagating? could you have been propagating? could they have been propagating?

Interro-negative form

Simple form	V-ing form
couldn't I propagate? couldn't you propagate? couldn't he propagate? couldn't we propagate? couldn't you propagate? couldn't they propagate?	couldn't I be propagating? couldn't you be propagating? couldn't he be propagating? couldn't we be propagating? couldn't you be propagating? couldn't they be propagating?
Perfect	V-ing perfect
couldn't I have propagated? couldn't you have propagated? couldn't he have propagated? couldn't we have propagated? couldn't you have propagated? couldn't they have propagated?	couldn't I have been propagating? couldn't you have been propagating? couldn't he have been propagating? couldn't we have been propagating? couldn't you have been propagating? couldn't they have been propagating?