English verb conjugation
COULD UNLACE

Regular verb: unlace - unlaced - unlaced

Affirmation

Simple form	V-ing form
I could unlace you could unlace she could unlace we could unlace you could unlace they could unlace	I could be unlacing you could be unlacing she could be unlacing we could be unlacing you could be unlacing they could be unlacing
Perfect	V-ing perfect
I could have unlaced you could have unlaced she could have unlaced we could have unlaced you could have unlaced they could have unlaced	I could have been unlacing you could have been unlacing she could have been unlacing we could have been unlacing you could have been unlacing they could have been unlacing

Negation

Simple form	V-ing form
I couldn't unlace you couldn't unlace she couldn't unlace we couldn't unlace you couldn't unlace they couldn't unlace	I couldn't be unlacing you couldn't be unlacing she couldn't be unlacing we couldn't be unlacing you couldn't be unlacing they couldn't be unlacing
Perfect	V-ing perfect
I couldn't have unlaced you couldn't have unlaced she couldn't have unlaced we couldn't have unlaced you couldn't have unlaced they couldn't have unlaced	I couldn't have been unlacing you couldn't have been unlacing she couldn't have been unlacing we couldn't have been unlacing you couldn't have been unlacing they couldn't have been unlacing

Interrogative form

Simple form	V-ing form
could I unlace? could you unlace? could she unlace? could we unlace? could you unlace? could they unlace?	could I be unlacing? could you be unlacing? could she be unlacing? could we be unlacing? could you be unlacing? could they be unlacing?
Perfect	V-ing perfect
could I have unlaced? could you have unlaced? could she have unlaced? could we have unlaced? could you have unlaced? could they have unlaced?	could I have been unlacing? could you have been unlacing? could she have been unlacing? could we have been unlacing? could you have been unlacing? could they have been unlacing?

Interro-negative form

Simple form	V-ing form
couldn't I unlace? couldn't you unlace? couldn't she unlace? couldn't we unlace? couldn't you unlace? couldn't they unlace?	couldn't I be unlacing? couldn't you be unlacing? couldn't she be unlacing? couldn't we be unlacing? couldn't you be unlacing? couldn't they be unlacing?
Perfect	V-ing perfect
couldn't I have unlaced? couldn't you have unlaced? couldn't she have unlaced? couldn't we have unlaced? couldn't you have unlaced? couldn't they have unlaced?	couldn't I have been unlacing? couldn't you have been unlacing? couldn't she have been unlacing? couldn't we have been unlacing? couldn't you have been unlacing? couldn't they have been unlacing?