may sham
Regular verb: sham - shammed- shammed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may sham
you may sham
she may sham
we may sham
you may sham
they may sham 	I may be shamming
you may be shamming
she may be shamming
we may be shamming
you may be shamming
they may be shamming	I may have shammed
you may have shammed
she may have shammed
we may have shammed
you may have shammed
they may have shammed	I may have been shamming
you may have been shamming
she may have been shamming
we may have been shamming
you may have been shamming
they may have been shamming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't sham
you mayn't sham
she mayn't sham
we mayn't sham
you mayn't sham
they mayn't sham 	I mayn't be shamming
you mayn't be shamming
she mayn't be shamming
we mayn't be shamming
you mayn't be shamming
they mayn't be shamming	I mayn't have shammed
you mayn't have shammed
she mayn't have shammed
we mayn't have shammed
you mayn't have shammed
they mayn't have shammed	I mayn't have been shamming
you mayn't have been shamming
she mayn't have been shamming
we mayn't have been shamming
you mayn't have been shamming
they mayn't have been shamming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I sham?
may you sham?
may she sham?
may we sham?
may you sham?
may they sham? 	may I be shamming?
may you be shamming?
may she be shamming?
may we be shamming?
may you be shamming?
may they be shamming? 	may I have shammed?
may you have shammed?
may she have shammed?
may we have shammed?
may you have shammed?
may they have shammed? 	may I have been shamming?
may you have been shamming?
may she have been shamming?
may we have been shamming?
may you have been shamming?
may they have been shamming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I sham?
mayn't you sham?
mayn't she sham?
mayn't we sham?
mayn't you sham?
mayn't they sham? 	mayn't I be shamming?
mayn't you be shamming?
mayn't she be shamming?
mayn't we be shamming?
mayn't you be shamming?
mayn't they be shamming? 	mayn't I have shammed?
mayn't you have shammed?
mayn't she have shammed?
mayn't we have shammed?
mayn't you have shammed?
mayn't they have shammed? 	mayn't I have been shamming?
mayn't you have been shamming?
mayn't she have been shamming?
mayn't we have been shamming?
mayn't you have been shamming?
mayn't they have been shamming?