could default
Regular verb: default - defaulted- defaulted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could default
you could default
she could default
we could default
you could default
they could default 	I could be defaulting
you could be defaulting
she could be defaulting
we could be defaulting
you could be defaulting
they could be defaulting	I could have defaulted
you could have defaulted
she could have defaulted
we could have defaulted
you could have defaulted
they could have defaulted	I could have been defaulting
you could have been defaulting
she could have been defaulting
we could have been defaulting
you could have been defaulting
they could have been defaulting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't default
you couldn't default
she couldn't default
we couldn't default
you couldn't default
they couldn't default 	I couldn't be defaulting
you couldn't be defaulting
she couldn't be defaulting
we couldn't be defaulting
you couldn't be defaulting
they couldn't be defaulting	I couldn't have defaulted
you couldn't have defaulted
she couldn't have defaulted
we couldn't have defaulted
you couldn't have defaulted
they couldn't have defaulted	I couldn't have been defaulting
you couldn't have been defaulting
she couldn't have been defaulting
we couldn't have been defaulting
you couldn't have been defaulting
they couldn't have been defaulting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I default?
could you default?
could she default?
could we default?
could you default?
could they default? 	could I be defaulting?
could you be defaulting?
could she be defaulting?
could we be defaulting?
could you be defaulting?
could they be defaulting? 	could I have defaulted?
could you have defaulted?
could she have defaulted?
could we have defaulted?
could you have defaulted?
could they have defaulted? 	could I have been defaulting?
could you have been defaulting?
could she have been defaulting?
could we have been defaulting?
could you have been defaulting?
could they have been defaulting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I default?
couldn't you default?
couldn't she default?
couldn't we default?
couldn't you default?
couldn't they default? 	couldn't I be defaulting?
couldn't you be defaulting?
couldn't she be defaulting?
couldn't we be defaulting?
couldn't you be defaulting?
couldn't they be defaulting? 	couldn't I have defaulted?
couldn't you have defaulted?
couldn't she have defaulted?
couldn't we have defaulted?
couldn't you have defaulted?
couldn't they have defaulted? 	couldn't I have been defaulting?
couldn't you have been defaulting?
couldn't she have been defaulting?
couldn't we have been defaulting?
couldn't you have been defaulting?
couldn't they have been defaulting?