could incur
Regular verb: incur - incurred- incurred

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could incur
you could incur
she could incur
we could incur
you could incur
they could incur 	I could be incurring
you could be incurring
she could be incurring
we could be incurring
you could be incurring
they could be incurring	I could have incurred
you could have incurred
she could have incurred
we could have incurred
you could have incurred
they could have incurred	I could have been incurring
you could have been incurring
she could have been incurring
we could have been incurring
you could have been incurring
they could have been incurring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't incur
you couldn't incur
she couldn't incur
we couldn't incur
you couldn't incur
they couldn't incur 	I couldn't be incurring
you couldn't be incurring
she couldn't be incurring
we couldn't be incurring
you couldn't be incurring
they couldn't be incurring	I couldn't have incurred
you couldn't have incurred
she couldn't have incurred
we couldn't have incurred
you couldn't have incurred
they couldn't have incurred	I couldn't have been incurring
you couldn't have been incurring
she couldn't have been incurring
we couldn't have been incurring
you couldn't have been incurring
they couldn't have been incurring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I incur?
could you incur?
could she incur?
could we incur?
could you incur?
could they incur? 	could I be incurring?
could you be incurring?
could she be incurring?
could we be incurring?
could you be incurring?
could they be incurring? 	could I have incurred?
could you have incurred?
could she have incurred?
could we have incurred?
could you have incurred?
could they have incurred? 	could I have been incurring?
could you have been incurring?
could she have been incurring?
could we have been incurring?
could you have been incurring?
could they have been incurring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I incur?
couldn't you incur?
couldn't she incur?
couldn't we incur?
couldn't you incur?
couldn't they incur? 	couldn't I be incurring?
couldn't you be incurring?
couldn't she be incurring?
couldn't we be incurring?
couldn't you be incurring?
couldn't they be incurring? 	couldn't I have incurred?
couldn't you have incurred?
couldn't she have incurred?
couldn't we have incurred?
couldn't you have incurred?
couldn't they have incurred? 	couldn't I have been incurring?
couldn't you have been incurring?
couldn't she have been incurring?
couldn't we have been incurring?
couldn't you have been incurring?
couldn't they have been incurring?