can avouch
Regular verb: avouch - avouched- avouched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can avouch
you can avouch
he can avouch
we can avouch
you can avouch
they can avouch 	I can be avouching
you can be avouching
he can be avouching
we can be avouching
you can be avouching
they can be avouching	I can have avouched
you can have avouched
he can have avouched
we can have avouched
you can have avouched
they can have avouched	I can have been avouching
you can have been avouching
he can have been avouching
we can have been avouching
you can have been avouching
they can have been avouching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't avouch
you can't avouch
he can't avouch
we can't avouch
you can't avouch
they can't avouch 	I can't be avouching
you can't be avouching
he can't be avouching
we can't be avouching
you can't be avouching
they can't be avouching	I can't have avouched
you can't have avouched
he can't have avouched
we can't have avouched
you can't have avouched
they can't have avouched	I can't have been avouching
you can't have been avouching
he can't have been avouching
we can't have been avouching
you can't have been avouching
they can't have been avouching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I avouch?
can you avouch?
can he avouch?
can we avouch?
can you avouch?
can they avouch? 	can I be avouching?
can you be avouching?
can he be avouching?
can we be avouching?
can you be avouching?
can they be avouching? 	can I have avouched?
can you have avouched?
can he have avouched?
can we have avouched?
can you have avouched?
can they have avouched? 	can I have been avouching?
can you have been avouching?
can he have been avouching?
can we have been avouching?
can you have been avouching?
can they have been avouching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I avouch?
can't you avouch?
can't he avouch?
can't we avouch?
can't you avouch?
can't they avouch? 	can't I be avouching?
can't you be avouching?
can't he be avouching?
can't we be avouching?
can't you be avouching?
can't they be avouching? 	can't I have avouched?
can't you have avouched?
can't he have avouched?
can't we have avouched?
can't you have avouched?
can't they have avouched? 	can't I have been avouching?
can't you have been avouching?
can't he have been avouching?
can't we have been avouching?
can't you have been avouching?
can't they have been avouching?