could chortle
Regular verb: chortle - chortled- chortled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could chortle
you could chortle
he could chortle
we could chortle
you could chortle
they could chortle 	I could be chortling
you could be chortling
he could be chortling
we could be chortling
you could be chortling
they could be chortling	I could have chortled
you could have chortled
he could have chortled
we could have chortled
you could have chortled
they could have chortled	I could have been chortling
you could have been chortling
he could have been chortling
we could have been chortling
you could have been chortling
they could have been chortling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't chortle
you couldn't chortle
he couldn't chortle
we couldn't chortle
you couldn't chortle
they couldn't chortle 	I couldn't be chortling
you couldn't be chortling
he couldn't be chortling
we couldn't be chortling
you couldn't be chortling
they couldn't be chortling	I couldn't have chortled
you couldn't have chortled
he couldn't have chortled
we couldn't have chortled
you couldn't have chortled
they couldn't have chortled	I couldn't have been chortling
you couldn't have been chortling
he couldn't have been chortling
we couldn't have been chortling
you couldn't have been chortling
they couldn't have been chortling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I chortle?
could you chortle?
could he chortle?
could we chortle?
could you chortle?
could they chortle? 	could I be chortling?
could you be chortling?
could he be chortling?
could we be chortling?
could you be chortling?
could they be chortling? 	could I have chortled?
could you have chortled?
could he have chortled?
could we have chortled?
could you have chortled?
could they have chortled? 	could I have been chortling?
could you have been chortling?
could he have been chortling?
could we have been chortling?
could you have been chortling?
could they have been chortling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I chortle?
couldn't you chortle?
couldn't he chortle?
couldn't we chortle?
couldn't you chortle?
couldn't they chortle? 	couldn't I be chortling?
couldn't you be chortling?
couldn't he be chortling?
couldn't we be chortling?
couldn't you be chortling?
couldn't they be chortling? 	couldn't I have chortled?
couldn't you have chortled?
couldn't he have chortled?
couldn't we have chortled?
couldn't you have chortled?
couldn't they have chortled? 	couldn't I have been chortling?
couldn't you have been chortling?
couldn't he have been chortling?
couldn't we have been chortling?
couldn't you have been chortling?
couldn't they have been chortling?