could alibi
Regular verb: alibi - alibied- alibied

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could alibi
you could alibi
he could alibi
we could alibi
you could alibi
they could alibi 	I could be alibiing
you could be alibiing
he could be alibiing
we could be alibiing
you could be alibiing
they could be alibiing	I could have alibied
you could have alibied
he could have alibied
we could have alibied
you could have alibied
they could have alibied	I could have been alibiing
you could have been alibiing
he could have been alibiing
we could have been alibiing
you could have been alibiing
they could have been alibiing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't alibi
you couldn't alibi
he couldn't alibi
we couldn't alibi
you couldn't alibi
they couldn't alibi 	I couldn't be alibiing
you couldn't be alibiing
he couldn't be alibiing
we couldn't be alibiing
you couldn't be alibiing
they couldn't be alibiing	I couldn't have alibied
you couldn't have alibied
he couldn't have alibied
we couldn't have alibied
you couldn't have alibied
they couldn't have alibied	I couldn't have been alibiing
you couldn't have been alibiing
he couldn't have been alibiing
we couldn't have been alibiing
you couldn't have been alibiing
they couldn't have been alibiing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I alibi?
could you alibi?
could he alibi?
could we alibi?
could you alibi?
could they alibi? 	could I be alibiing?
could you be alibiing?
could he be alibiing?
could we be alibiing?
could you be alibiing?
could they be alibiing? 	could I have alibied?
could you have alibied?
could he have alibied?
could we have alibied?
could you have alibied?
could they have alibied? 	could I have been alibiing?
could you have been alibiing?
could he have been alibiing?
could we have been alibiing?
could you have been alibiing?
could they have been alibiing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I alibi?
couldn't you alibi?
couldn't he alibi?
couldn't we alibi?
couldn't you alibi?
couldn't they alibi? 	couldn't I be alibiing?
couldn't you be alibiing?
couldn't he be alibiing?
couldn't we be alibiing?
couldn't you be alibiing?
couldn't they be alibiing? 	couldn't I have alibied?
couldn't you have alibied?
couldn't he have alibied?
couldn't we have alibied?
couldn't you have alibied?
couldn't they have alibied? 	couldn't I have been alibiing?
couldn't you have been alibiing?
couldn't he have been alibiing?
couldn't we have been alibiing?
couldn't you have been alibiing?
couldn't they have been alibiing?