may attest
Regular verb: attest - attested- attested

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may attest
you may attest
she may attest
we may attest
you may attest
they may attest 	I may be attesting
you may be attesting
she may be attesting
we may be attesting
you may be attesting
they may be attesting	I may have attested
you may have attested
she may have attested
we may have attested
you may have attested
they may have attested	I may have been attesting
you may have been attesting
she may have been attesting
we may have been attesting
you may have been attesting
they may have been attesting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't attest
you mayn't attest
she mayn't attest
we mayn't attest
you mayn't attest
they mayn't attest 	I mayn't be attesting
you mayn't be attesting
she mayn't be attesting
we mayn't be attesting
you mayn't be attesting
they mayn't be attesting	I mayn't have attested
you mayn't have attested
she mayn't have attested
we mayn't have attested
you mayn't have attested
they mayn't have attested	I mayn't have been attesting
you mayn't have been attesting
she mayn't have been attesting
we mayn't have been attesting
you mayn't have been attesting
they mayn't have been attesting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I attest?
may you attest?
may she attest?
may we attest?
may you attest?
may they attest? 	may I be attesting?
may you be attesting?
may she be attesting?
may we be attesting?
may you be attesting?
may they be attesting? 	may I have attested?
may you have attested?
may she have attested?
may we have attested?
may you have attested?
may they have attested? 	may I have been attesting?
may you have been attesting?
may she have been attesting?
may we have been attesting?
may you have been attesting?
may they have been attesting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I attest?
mayn't you attest?
mayn't she attest?
mayn't we attest?
mayn't you attest?
mayn't they attest? 	mayn't I be attesting?
mayn't you be attesting?
mayn't she be attesting?
mayn't we be attesting?
mayn't you be attesting?
mayn't they be attesting? 	mayn't I have attested?
mayn't you have attested?
mayn't she have attested?
mayn't we have attested?
mayn't you have attested?
mayn't they have attested? 	mayn't I have been attesting?
mayn't you have been attesting?
mayn't she have been attesting?
mayn't we have been attesting?
mayn't you have been attesting?
mayn't they have been attesting?