may bumble
Regular verb: bumble - bumbled- bumbled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may bumble
you may bumble
he may bumble
we may bumble
you may bumble
they may bumble 	I may be bumbling
you may be bumbling
he may be bumbling
we may be bumbling
you may be bumbling
they may be bumbling	I may have bumbled
you may have bumbled
he may have bumbled
we may have bumbled
you may have bumbled
they may have bumbled	I may have been bumbling
you may have been bumbling
he may have been bumbling
we may have been bumbling
you may have been bumbling
they may have been bumbling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't bumble
you mayn't bumble
he mayn't bumble
we mayn't bumble
you mayn't bumble
they mayn't bumble 	I mayn't be bumbling
you mayn't be bumbling
he mayn't be bumbling
we mayn't be bumbling
you mayn't be bumbling
they mayn't be bumbling	I mayn't have bumbled
you mayn't have bumbled
he mayn't have bumbled
we mayn't have bumbled
you mayn't have bumbled
they mayn't have bumbled	I mayn't have been bumbling
you mayn't have been bumbling
he mayn't have been bumbling
we mayn't have been bumbling
you mayn't have been bumbling
they mayn't have been bumbling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I bumble?
may you bumble?
may he bumble?
may we bumble?
may you bumble?
may they bumble? 	may I be bumbling?
may you be bumbling?
may he be bumbling?
may we be bumbling?
may you be bumbling?
may they be bumbling? 	may I have bumbled?
may you have bumbled?
may he have bumbled?
may we have bumbled?
may you have bumbled?
may they have bumbled? 	may I have been bumbling?
may you have been bumbling?
may he have been bumbling?
may we have been bumbling?
may you have been bumbling?
may they have been bumbling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I bumble?
mayn't you bumble?
mayn't he bumble?
mayn't we bumble?
mayn't you bumble?
mayn't they bumble? 	mayn't I be bumbling?
mayn't you be bumbling?
mayn't he be bumbling?
mayn't we be bumbling?
mayn't you be bumbling?
mayn't they be bumbling? 	mayn't I have bumbled?
mayn't you have bumbled?
mayn't he have bumbled?
mayn't we have bumbled?
mayn't you have bumbled?
mayn't they have bumbled? 	mayn't I have been bumbling?
mayn't you have been bumbling?
mayn't he have been bumbling?
mayn't we have been bumbling?
mayn't you have been bumbling?
mayn't they have been bumbling?