English verb conjugation
COULD PLAGIARIZE

Regular verb: plagiarize - plagiarized - plagiarized

Affirmation

Simple form	V-ing form
I could plagiarize you could plagiarize he could plagiarize we could plagiarize you could plagiarize they could plagiarize	I could be plagiarizing you could be plagiarizing he could be plagiarizing we could be plagiarizing you could be plagiarizing they could be plagiarizing
Perfect	V-ing perfect
I could have plagiarized you could have plagiarized he could have plagiarized we could have plagiarized you could have plagiarized they could have plagiarized	I could have been plagiarizing you could have been plagiarizing he could have been plagiarizing we could have been plagiarizing you could have been plagiarizing they could have been plagiarizing

Negation

Simple form	V-ing form
I couldn't plagiarize you couldn't plagiarize he couldn't plagiarize we couldn't plagiarize you couldn't plagiarize they couldn't plagiarize	I couldn't be plagiarizing you couldn't be plagiarizing he couldn't be plagiarizing we couldn't be plagiarizing you couldn't be plagiarizing they couldn't be plagiarizing
Perfect	V-ing perfect
I couldn't have plagiarized you couldn't have plagiarized he couldn't have plagiarized we couldn't have plagiarized you couldn't have plagiarized they couldn't have plagiarized	I couldn't have been plagiarizing you couldn't have been plagiarizing he couldn't have been plagiarizing we couldn't have been plagiarizing you couldn't have been plagiarizing they couldn't have been plagiarizing

Interrogative form

Simple form	V-ing form
could I plagiarize? could you plagiarize? could he plagiarize? could we plagiarize? could you plagiarize? could they plagiarize?	could I be plagiarizing? could you be plagiarizing? could he be plagiarizing? could we be plagiarizing? could you be plagiarizing? could they be plagiarizing?
Perfect	V-ing perfect
could I have plagiarized? could you have plagiarized? could he have plagiarized? could we have plagiarized? could you have plagiarized? could they have plagiarized?	could I have been plagiarizing? could you have been plagiarizing? could he have been plagiarizing? could we have been plagiarizing? could you have been plagiarizing? could they have been plagiarizing?

Interro-negative form

Simple form	V-ing form
couldn't I plagiarize? couldn't you plagiarize? couldn't he plagiarize? couldn't we plagiarize? couldn't you plagiarize? couldn't they plagiarize?	couldn't I be plagiarizing? couldn't you be plagiarizing? couldn't he be plagiarizing? couldn't we be plagiarizing? couldn't you be plagiarizing? couldn't they be plagiarizing?
Perfect	V-ing perfect
couldn't I have plagiarized? couldn't you have plagiarized? couldn't he have plagiarized? couldn't we have plagiarized? couldn't you have plagiarized? couldn't they have plagiarized?	couldn't I have been plagiarizing? couldn't you have been plagiarizing? couldn't he have been plagiarizing? couldn't we have been plagiarizing? couldn't you have been plagiarizing? couldn't they have been plagiarizing?