could time
Regular verb: time - timed- timed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could time
you could time
she could time
we could time
you could time
they could time 	I could be timing
you could be timing
she could be timing
we could be timing
you could be timing
they could be timing	I could have timed
you could have timed
she could have timed
we could have timed
you could have timed
they could have timed	I could have been timing
you could have been timing
she could have been timing
we could have been timing
you could have been timing
they could have been timing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't time
you couldn't time
she couldn't time
we couldn't time
you couldn't time
they couldn't time 	I couldn't be timing
you couldn't be timing
she couldn't be timing
we couldn't be timing
you couldn't be timing
they couldn't be timing	I couldn't have timed
you couldn't have timed
she couldn't have timed
we couldn't have timed
you couldn't have timed
they couldn't have timed	I couldn't have been timing
you couldn't have been timing
she couldn't have been timing
we couldn't have been timing
you couldn't have been timing
they couldn't have been timing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I time?
could you time?
could she time?
could we time?
could you time?
could they time? 	could I be timing?
could you be timing?
could she be timing?
could we be timing?
could you be timing?
could they be timing? 	could I have timed?
could you have timed?
could she have timed?
could we have timed?
could you have timed?
could they have timed? 	could I have been timing?
could you have been timing?
could she have been timing?
could we have been timing?
could you have been timing?
could they have been timing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I time?
couldn't you time?
couldn't she time?
couldn't we time?
couldn't you time?
couldn't they time? 	couldn't I be timing?
couldn't you be timing?
couldn't she be timing?
couldn't we be timing?
couldn't you be timing?
couldn't they be timing? 	couldn't I have timed?
couldn't you have timed?
couldn't she have timed?
couldn't we have timed?
couldn't you have timed?
couldn't they have timed? 	couldn't I have been timing?
couldn't you have been timing?
couldn't she have been timing?
couldn't we have been timing?
couldn't you have been timing?
couldn't they have been timing?