could lace
Regular verb: lace - laced- laced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could lace
you could lace
he could lace
we could lace
you could lace
they could lace 	I could be lacing
you could be lacing
he could be lacing
we could be lacing
you could be lacing
they could be lacing	I could have laced
you could have laced
he could have laced
we could have laced
you could have laced
they could have laced	I could have been lacing
you could have been lacing
he could have been lacing
we could have been lacing
you could have been lacing
they could have been lacing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not lace
you could not lace
he could not lace
we could not lace
you could not lace
they could not lace 	I could not be lacing
you could not be lacing
he could not be lacing
we could not be lacing
you could not be lacing
they could not be lacing	I could not have laced
you could not have laced
he could not have laced
we could not have laced
you could not have laced
they could not have laced	I could not have been lacing
you could not have been lacing
he could not have been lacing
we could not have been lacing
you could not have been lacing
they could not have been lacing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I lace?
could you lace?
could he lace?
could we lace?
could you lace?
could they lace? 	could I be lacing?
could you be lacing?
could he be lacing?
could we be lacing?
could you be lacing?
could they be lacing? 	could I have laced?
could you have laced?
could he have laced?
could we have laced?
could you have laced?
could they have laced? 	could I have been lacing?
could you have been lacing?
could he have been lacing?
could we have been lacing?
could you have been lacing?
could they have been lacing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not lace?
could you not lace?
could he not lace?
could we not lace?
could you not lace?
could they not lace? 	could I not be lacing?
could you not be lacing?
could he not be lacing?
could we not be lacing?
could you not be lacing?
could they not be lacing? 	could I not have laced?
could you not have laced?
could he not have laced?
could we not have laced?
could you not have laced?
could they not have laced? 	could I not have been lacing?
could you not have been lacing?
could he not have been lacing?
could we not have been lacing?
could you not have been lacing?
could they not have been lacing?