may placard
Regular verb: placard - placarded- placarded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may placard
you may placard
she may placard
we may placard
you may placard
they may placard 	I may be placarding
you may be placarding
she may be placarding
we may be placarding
you may be placarding
they may be placarding	I may have placarded
you may have placarded
she may have placarded
we may have placarded
you may have placarded
they may have placarded	I may have been placarding
you may have been placarding
she may have been placarding
we may have been placarding
you may have been placarding
they may have been placarding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't placard
you mayn't placard
she mayn't placard
we mayn't placard
you mayn't placard
they mayn't placard 	I mayn't be placarding
you mayn't be placarding
she mayn't be placarding
we mayn't be placarding
you mayn't be placarding
they mayn't be placarding	I mayn't have placarded
you mayn't have placarded
she mayn't have placarded
we mayn't have placarded
you mayn't have placarded
they mayn't have placarded	I mayn't have been placarding
you mayn't have been placarding
she mayn't have been placarding
we mayn't have been placarding
you mayn't have been placarding
they mayn't have been placarding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I placard?
may you placard?
may she placard?
may we placard?
may you placard?
may they placard? 	may I be placarding?
may you be placarding?
may she be placarding?
may we be placarding?
may you be placarding?
may they be placarding? 	may I have placarded?
may you have placarded?
may she have placarded?
may we have placarded?
may you have placarded?
may they have placarded? 	may I have been placarding?
may you have been placarding?
may she have been placarding?
may we have been placarding?
may you have been placarding?
may they have been placarding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I placard?
mayn't you placard?
mayn't she placard?
mayn't we placard?
mayn't you placard?
mayn't they placard? 	mayn't I be placarding?
mayn't you be placarding?
mayn't she be placarding?
mayn't we be placarding?
mayn't you be placarding?
mayn't they be placarding? 	mayn't I have placarded?
mayn't you have placarded?
mayn't she have placarded?
mayn't we have placarded?
mayn't you have placarded?
mayn't they have placarded? 	mayn't I have been placarding?
mayn't you have been placarding?
mayn't she have been placarding?
mayn't we have been placarding?
mayn't you have been placarding?
mayn't they have been placarding?