can default
Regular verb: default - defaulted- defaulted

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

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

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

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