English verb conjugation
COULD CHART

Regular verb: chart - charted - charted

Affirmation

Simple form	V-ing form
I could chart you could chart he could chart we could chart you could chart they could chart	I could be charting you could be charting he could be charting we could be charting you could be charting they could be charting
Perfect	V-ing perfect
I could have charted you could have charted he could have charted we could have charted you could have charted they could have charted	I could have been charting you could have been charting he could have been charting we could have been charting you could have been charting they could have been charting

Negation

Simple form	V-ing form
I couldn't chart you couldn't chart he couldn't chart we couldn't chart you couldn't chart they couldn't chart	I couldn't be charting you couldn't be charting he couldn't be charting we couldn't be charting you couldn't be charting they couldn't be charting
Perfect	V-ing perfect
I couldn't have charted you couldn't have charted he couldn't have charted we couldn't have charted you couldn't have charted they couldn't have charted	I couldn't have been charting you couldn't have been charting he couldn't have been charting we couldn't have been charting you couldn't have been charting they couldn't have been charting

Interrogative form

Simple form	V-ing form
could I chart? could you chart? could he chart? could we chart? could you chart? could they chart?	could I be charting? could you be charting? could he be charting? could we be charting? could you be charting? could they be charting?
Perfect	V-ing perfect
could I have charted? could you have charted? could he have charted? could we have charted? could you have charted? could they have charted?	could I have been charting? could you have been charting? could he have been charting? could we have been charting? could you have been charting? could they have been charting?

Interro-negative form

Simple form	V-ing form
couldn't I chart? couldn't you chart? couldn't he chart? couldn't we chart? couldn't you chart? couldn't they chart?	couldn't I be charting? couldn't you be charting? couldn't he be charting? couldn't we be charting? couldn't you be charting? couldn't they be charting?
Perfect	V-ing perfect
couldn't I have charted? couldn't you have charted? couldn't he have charted? couldn't we have charted? couldn't you have charted? couldn't they have charted?	couldn't I have been charting? couldn't you have been charting? couldn't he have been charting? couldn't we have been charting? couldn't you have been charting? couldn't they have been charting?