may yackety-yack
Regular verb: yackety-yack - yackety-yacked- yackety-yacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may yackety-yack
you may yackety-yack
she may yackety-yack
we may yackety-yack
you may yackety-yack
they may yackety-yack 	I may be yackety-yacking
you may be yackety-yacking
she may be yackety-yacking
we may be yackety-yacking
you may be yackety-yacking
they may be yackety-yacking	I may have yackety-yacked
you may have yackety-yacked
she may have yackety-yacked
we may have yackety-yacked
you may have yackety-yacked
they may have yackety-yacked	I may have been yackety-yacking
you may have been yackety-yacking
she may have been yackety-yacking
we may have been yackety-yacking
you may have been yackety-yacking
they may have been yackety-yacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't yackety-yack
you mayn't yackety-yack
she mayn't yackety-yack
we mayn't yackety-yack
you mayn't yackety-yack
they mayn't yackety-yack 	I mayn't be yackety-yacking
you mayn't be yackety-yacking
she mayn't be yackety-yacking
we mayn't be yackety-yacking
you mayn't be yackety-yacking
they mayn't be yackety-yacking	I mayn't have yackety-yacked
you mayn't have yackety-yacked
she mayn't have yackety-yacked
we mayn't have yackety-yacked
you mayn't have yackety-yacked
they mayn't have yackety-yacked	I mayn't have been yackety-yacking
you mayn't have been yackety-yacking
she mayn't have been yackety-yacking
we mayn't have been yackety-yacking
you mayn't have been yackety-yacking
they mayn't have been yackety-yacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I yackety-yack?
may you yackety-yack?
may she yackety-yack?
may we yackety-yack?
may you yackety-yack?
may they yackety-yack? 	may I be yackety-yacking?
may you be yackety-yacking?
may she be yackety-yacking?
may we be yackety-yacking?
may you be yackety-yacking?
may they be yackety-yacking? 	may I have yackety-yacked?
may you have yackety-yacked?
may she have yackety-yacked?
may we have yackety-yacked?
may you have yackety-yacked?
may they have yackety-yacked? 	may I have been yackety-yacking?
may you have been yackety-yacking?
may she have been yackety-yacking?
may we have been yackety-yacking?
may you have been yackety-yacking?
may they have been yackety-yacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I yackety-yack?
mayn't you yackety-yack?
mayn't she yackety-yack?
mayn't we yackety-yack?
mayn't you yackety-yack?
mayn't they yackety-yack? 	mayn't I be yackety-yacking?
mayn't you be yackety-yacking?
mayn't she be yackety-yacking?
mayn't we be yackety-yacking?
mayn't you be yackety-yacking?
mayn't they be yackety-yacking? 	mayn't I have yackety-yacked?
mayn't you have yackety-yacked?
mayn't she have yackety-yacked?
mayn't we have yackety-yacked?
mayn't you have yackety-yacked?
mayn't they have yackety-yacked? 	mayn't I have been yackety-yacking?
mayn't you have been yackety-yacking?
mayn't she have been yackety-yacking?
mayn't we have been yackety-yacking?
mayn't you have been yackety-yacking?
mayn't they have been yackety-yacking?