may vouch
Regular verb: vouch - vouched- vouched

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may vouch
you may vouch
she may vouch
we may vouch
you may vouch
they may vouch 	I may be vouching
you may be vouching
she may be vouching
we may be vouching
you may be vouching
they may be vouching	I may have vouched
you may have vouched
she 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
she 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
she 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
she 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
she 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
she 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 she vouch?
may we vouch?
may you vouch?
may they vouch? 	may I be vouching?
may you be vouching?
may she be vouching?
may we be vouching?
may you be vouching?
may they be vouching? 	may I have vouched?
may you have vouched?
may she 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 she 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 she 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 she 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 she 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 she have been vouching?
mayn't we have been vouching?
mayn't you have been vouching?
mayn't they have been vouching?