English verb conjugation
COULD PACE

Regular verb: pace - paced - paced

Affirmation

Simple form	V-ing form
I could pace you could pace he could pace we could pace you could pace they could pace	I could be pacing you could be pacing he could be pacing we could be pacing you could be pacing they could be pacing
Perfect	V-ing perfect
I could have paced you could have paced he could have paced we could have paced you could have paced they could have paced	I could have been pacing you could have been pacing he could have been pacing we could have been pacing you could have been pacing they could have been pacing

Negation

Simple form	V-ing form
I couldn't pace you couldn't pace he couldn't pace we couldn't pace you couldn't pace they couldn't pace	I couldn't be pacing you couldn't be pacing he couldn't be pacing we couldn't be pacing you couldn't be pacing they couldn't be pacing
Perfect	V-ing perfect
I couldn't have paced you couldn't have paced he couldn't have paced we couldn't have paced you couldn't have paced they couldn't have paced	I couldn't have been pacing you couldn't have been pacing he couldn't have been pacing we couldn't have been pacing you couldn't have been pacing they couldn't have been pacing

Interrogative form

Simple form	V-ing form
could I pace? could you pace? could he pace? could we pace? could you pace? could they pace?	could I be pacing? could you be pacing? could he be pacing? could we be pacing? could you be pacing? could they be pacing?
Perfect	V-ing perfect
could I have paced? could you have paced? could he have paced? could we have paced? could you have paced? could they have paced?	could I have been pacing? could you have been pacing? could he have been pacing? could we have been pacing? could you have been pacing? could they have been pacing?

Interro-negative form

Simple form	V-ing form
couldn't I pace? couldn't you pace? couldn't he pace? couldn't we pace? couldn't you pace? couldn't they pace?	couldn't I be pacing? couldn't you be pacing? couldn't he be pacing? couldn't we be pacing? couldn't you be pacing? couldn't they be pacing?
Perfect	V-ing perfect
couldn't I have paced? couldn't you have paced? couldn't he have paced? couldn't we have paced? couldn't you have paced? couldn't they have paced?	couldn't I have been pacing? couldn't you have been pacing? couldn't he have been pacing? couldn't we have been pacing? couldn't you have been pacing? couldn't they have been pacing?