I could immunize you could immunize she could immunize we could immunize you could immunize they could immunize
V-ing form
I could be immunizing you could be immunizing she could be immunizing we could be immunizing you could be immunizing they could be immunizing
Perfect
I could have immunized you could have immunized she could have immunized we could have immunized you could have immunized they could have immunized
V-ing perfect
I could have been immunizing you could have been immunizing she could have been immunizing we could have been immunizing you could have been immunizing they could have been immunizing
Negation
Simple form
I could not immunize you could not immunize she could not immunize we could not immunize you could not immunize they could not immunize
V-ing form
I could not be immunizing you could not be immunizing she could not be immunizing we could not be immunizing you could not be immunizing they could not be immunizing
Perfect
I could not have immunized you could not have immunized she could not have immunized we could not have immunized you could not have immunized they could not have immunized
V-ing perfect
I could not have been immunizing you could not have been immunizing she could not have been immunizing we could not have been immunizing you could not have been immunizing they could not have been immunizing
Interrogative form
Simple form
could I immunize? could you immunize? could she immunize? could we immunize? could you immunize? could they immunize?
V-ing form
could I be immunizing? could you be immunizing? could she be immunizing? could we be immunizing? could you be immunizing? could they be immunizing?
Perfect
could I have immunized? could you have immunized? could she have immunized? could we have immunized? could you have immunized? could they have immunized?
V-ing perfect
could I have been immunizing? could you have been immunizing? could she have been immunizing? could we have been immunizing? could you have been immunizing? could they have been immunizing?
Interro-negative form
Simple form
could I not immunize? could you not immunize? could she not immunize? could we not immunize? could you not immunize? could they not immunize?
V-ing form
could I not be immunizing? could you not be immunizing? could she not be immunizing? could we not be immunizing? could you not be immunizing? could they not be immunizing?
Perfect
could I not have immunized? could you not have immunized? could she not have immunized? could we not have immunized? could you not have immunized? could they not have immunized?
V-ing perfect
could I not have been immunizing? could you not have been immunizing? could she not have been immunizing? could we not have been immunizing? could you not have been immunizing? could they not have been immunizing?