could cerebrate
Regular verb: cerebrate - cerebrated- cerebrated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could cerebrate
you could cerebrate
he could cerebrate
we could cerebrate
you could cerebrate
they could cerebrate 	I could be cerebrating
you could be cerebrating
he could be cerebrating
we could be cerebrating
you could be cerebrating
they could be cerebrating	I could have cerebrated
you could have cerebrated
he could have cerebrated
we could have cerebrated
you could have cerebrated
they could have cerebrated	I could have been cerebrating
you could have been cerebrating
he could have been cerebrating
we could have been cerebrating
you could have been cerebrating
they could have been cerebrating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't cerebrate
you couldn't cerebrate
he couldn't cerebrate
we couldn't cerebrate
you couldn't cerebrate
they couldn't cerebrate 	I couldn't be cerebrating
you couldn't be cerebrating
he couldn't be cerebrating
we couldn't be cerebrating
you couldn't be cerebrating
they couldn't be cerebrating	I couldn't have cerebrated
you couldn't have cerebrated
he couldn't have cerebrated
we couldn't have cerebrated
you couldn't have cerebrated
they couldn't have cerebrated	I couldn't have been cerebrating
you couldn't have been cerebrating
he couldn't have been cerebrating
we couldn't have been cerebrating
you couldn't have been cerebrating
they couldn't have been cerebrating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I cerebrate?
could you cerebrate?
could he cerebrate?
could we cerebrate?
could you cerebrate?
could they cerebrate? 	could I be cerebrating?
could you be cerebrating?
could he be cerebrating?
could we be cerebrating?
could you be cerebrating?
could they be cerebrating? 	could I have cerebrated?
could you have cerebrated?
could he have cerebrated?
could we have cerebrated?
could you have cerebrated?
could they have cerebrated? 	could I have been cerebrating?
could you have been cerebrating?
could he have been cerebrating?
could we have been cerebrating?
could you have been cerebrating?
could they have been cerebrating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I cerebrate?
couldn't you cerebrate?
couldn't he cerebrate?
couldn't we cerebrate?
couldn't you cerebrate?
couldn't they cerebrate? 	couldn't I be cerebrating?
couldn't you be cerebrating?
couldn't he be cerebrating?
couldn't we be cerebrating?
couldn't you be cerebrating?
couldn't they be cerebrating? 	couldn't I have cerebrated?
couldn't you have cerebrated?
couldn't he have cerebrated?
couldn't we have cerebrated?
couldn't you have cerebrated?
couldn't they have cerebrated? 	couldn't I have been cerebrating?
couldn't you have been cerebrating?
couldn't he have been cerebrating?
couldn't we have been cerebrating?
couldn't you have been cerebrating?
couldn't they have been cerebrating?