may vouch
Regular verb: vouch - vouched- vouched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may vouch
you may vouch
he may vouch
we may vouch
you may vouch
they may vouch 	I may be vouching
you may be vouching
he may be vouching
we may be vouching
you may be vouching
they may be vouching	I may have vouched
you may have vouched
he may have vouched
we may have vouched
you may have vouched
they may have vouched	I may have been vouching
you may have been vouching
he may have been vouching
we may have been vouching
you may have been vouching
they may have been vouching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't vouch
you mayn't vouch
he mayn't vouch
we mayn't vouch
you mayn't vouch
they mayn't vouch 	I mayn't be vouching
you mayn't be vouching
he mayn't be vouching
we mayn't be vouching
you mayn't be vouching
they mayn't be vouching	I mayn't have vouched
you mayn't have vouched
he mayn't have vouched
we mayn't have vouched
you mayn't have vouched
they mayn't have vouched	I mayn't have been vouching
you mayn't have been vouching
he mayn't have been vouching
we mayn't have been vouching
you mayn't have been vouching
they mayn't have been vouching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I vouch?
may you vouch?
may he vouch?
may we vouch?
may you vouch?
may they vouch? 	may I be vouching?
may you be vouching?
may he be vouching?
may we be vouching?
may you be vouching?
may they be vouching? 	may I have vouched?
may you have vouched?
may he have vouched?
may we have vouched?
may you have vouched?
may they have vouched? 	may I have been vouching?
may you have been vouching?
may he have been vouching?
may we have been vouching?
may you have been vouching?
may they have been vouching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I vouch?
mayn't you vouch?
mayn't he vouch?
mayn't we vouch?
mayn't you vouch?
mayn't they vouch? 	mayn't I be vouching?
mayn't you be vouching?
mayn't he be vouching?
mayn't we be vouching?
mayn't you be vouching?
mayn't they be vouching? 	mayn't I have vouched?
mayn't you have vouched?
mayn't he have vouched?
mayn't we have vouched?
mayn't you have vouched?
mayn't they have vouched? 	mayn't I have been vouching?
mayn't you have been vouching?
mayn't he have been vouching?
mayn't we have been vouching?
mayn't you have been vouching?
mayn't they have been vouching?