English verb conjugation
COULD VACCINATE

Regular verb: vaccinate - vaccinated - vaccinated

Affirmation

Simple form	V-ing form
I could vaccinate you could vaccinate she could vaccinate we could vaccinate you could vaccinate they could vaccinate	I could be vaccinating you could be vaccinating she could be vaccinating we could be vaccinating you could be vaccinating they could be vaccinating
Perfect	V-ing perfect
I could have vaccinated you could have vaccinated she could have vaccinated we could have vaccinated you could have vaccinated they could have vaccinated	I could have been vaccinating you could have been vaccinating she could have been vaccinating we could have been vaccinating you could have been vaccinating they could have been vaccinating

Negation

Simple form	V-ing form
I couldn't vaccinate you couldn't vaccinate she couldn't vaccinate we couldn't vaccinate you couldn't vaccinate they couldn't vaccinate	I couldn't be vaccinating you couldn't be vaccinating she couldn't be vaccinating we couldn't be vaccinating you couldn't be vaccinating they couldn't be vaccinating
Perfect	V-ing perfect
I couldn't have vaccinated you couldn't have vaccinated she couldn't have vaccinated we couldn't have vaccinated you couldn't have vaccinated they couldn't have vaccinated	I couldn't have been vaccinating you couldn't have been vaccinating she couldn't have been vaccinating we couldn't have been vaccinating you couldn't have been vaccinating they couldn't have been vaccinating

Interrogative form

Simple form	V-ing form
could I vaccinate? could you vaccinate? could she vaccinate? could we vaccinate? could you vaccinate? could they vaccinate?	could I be vaccinating? could you be vaccinating? could she be vaccinating? could we be vaccinating? could you be vaccinating? could they be vaccinating?
Perfect	V-ing perfect
could I have vaccinated? could you have vaccinated? could she have vaccinated? could we have vaccinated? could you have vaccinated? could they have vaccinated?	could I have been vaccinating? could you have been vaccinating? could she have been vaccinating? could we have been vaccinating? could you have been vaccinating? could they have been vaccinating?

Interro-negative form

Simple form	V-ing form
couldn't I vaccinate? couldn't you vaccinate? couldn't she vaccinate? couldn't we vaccinate? couldn't you vaccinate? couldn't they vaccinate?	couldn't I be vaccinating? couldn't you be vaccinating? couldn't she be vaccinating? couldn't we be vaccinating? couldn't you be vaccinating? couldn't they be vaccinating?
Perfect	V-ing perfect
couldn't I have vaccinated? couldn't you have vaccinated? couldn't she have vaccinated? couldn't we have vaccinated? couldn't you have vaccinated? couldn't they have vaccinated?	couldn't I have been vaccinating? couldn't you have been vaccinating? couldn't she have been vaccinating? couldn't we have been vaccinating? couldn't you have been vaccinating? couldn't they have been vaccinating?