English verb conjugation
COULD PLAGIARIZE

Regular verb: plagiarize - plagiarized - plagiarized

Affirmation

Simple form	V-ing form
I could plagiarize you could plagiarize she could plagiarize we could plagiarize you could plagiarize they could plagiarize	I could be plagiarizing you could be plagiarizing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she plagiarize? could we plagiarize? could you plagiarize? could they plagiarize?	could I be plagiarizing? could you be plagiarizing? could she 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 she 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 she 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 she 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 she 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 she 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 she have been plagiarizing? couldn't we have been plagiarizing? couldn't you have been plagiarizing? couldn't they have been plagiarizing?