English verb conjugation
COULD SCRUTINIZE

Regular verb: scrutinize - scrutinized - scrutinized

Affirmation

Simple form	V-ing form
I could scrutinize you could scrutinize he could scrutinize we could scrutinize you could scrutinize they could scrutinize	I could be scrutinizing you could be scrutinizing he could be scrutinizing we could be scrutinizing you could be scrutinizing they could be scrutinizing
Perfect	V-ing perfect
I could have scrutinized you could have scrutinized he could have scrutinized we could have scrutinized you could have scrutinized they could have scrutinized	I could have been scrutinizing you could have been scrutinizing he could have been scrutinizing we could have been scrutinizing you could have been scrutinizing they could have been scrutinizing

Negation

Simple form	V-ing form
I couldn't scrutinize you couldn't scrutinize he couldn't scrutinize we couldn't scrutinize you couldn't scrutinize they couldn't scrutinize	I couldn't be scrutinizing you couldn't be scrutinizing he couldn't be scrutinizing we couldn't be scrutinizing you couldn't be scrutinizing they couldn't be scrutinizing
Perfect	V-ing perfect
I couldn't have scrutinized you couldn't have scrutinized he couldn't have scrutinized we couldn't have scrutinized you couldn't have scrutinized they couldn't have scrutinized	I couldn't have been scrutinizing you couldn't have been scrutinizing he couldn't have been scrutinizing we couldn't have been scrutinizing you couldn't have been scrutinizing they couldn't have been scrutinizing

Interrogative form

Simple form	V-ing form
could I scrutinize? could you scrutinize? could he scrutinize? could we scrutinize? could you scrutinize? could they scrutinize?	could I be scrutinizing? could you be scrutinizing? could he be scrutinizing? could we be scrutinizing? could you be scrutinizing? could they be scrutinizing?
Perfect	V-ing perfect
could I have scrutinized? could you have scrutinized? could he have scrutinized? could we have scrutinized? could you have scrutinized? could they have scrutinized?	could I have been scrutinizing? could you have been scrutinizing? could he have been scrutinizing? could we have been scrutinizing? could you have been scrutinizing? could they have been scrutinizing?

Interro-negative form

Simple form	V-ing form
couldn't I scrutinize? couldn't you scrutinize? couldn't he scrutinize? couldn't we scrutinize? couldn't you scrutinize? couldn't they scrutinize?	couldn't I be scrutinizing? couldn't you be scrutinizing? couldn't he be scrutinizing? couldn't we be scrutinizing? couldn't you be scrutinizing? couldn't they be scrutinizing?
Perfect	V-ing perfect
couldn't I have scrutinized? couldn't you have scrutinized? couldn't he have scrutinized? couldn't we have scrutinized? couldn't you have scrutinized? couldn't they have scrutinized?	couldn't I have been scrutinizing? couldn't you have been scrutinizing? couldn't he have been scrutinizing? couldn't we have been scrutinizing? couldn't you have been scrutinizing? couldn't they have been scrutinizing?