may knell
Regular verb: knell - knelled- knelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may knell
you may knell
he may knell
we may knell
you may knell
they may knell 	I may be knelling
you may be knelling
he may be knelling
we may be knelling
you may be knelling
they may be knelling	I may have knelled
you may have knelled
he may have knelled
we may have knelled
you may have knelled
they may have knelled	I may have been knelling
you may have been knelling
he may have been knelling
we may have been knelling
you may have been knelling
they may have been knelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't knell
you mayn't knell
he mayn't knell
we mayn't knell
you mayn't knell
they mayn't knell 	I mayn't be knelling
you mayn't be knelling
he mayn't be knelling
we mayn't be knelling
you mayn't be knelling
they mayn't be knelling	I mayn't have knelled
you mayn't have knelled
he mayn't have knelled
we mayn't have knelled
you mayn't have knelled
they mayn't have knelled	I mayn't have been knelling
you mayn't have been knelling
he mayn't have been knelling
we mayn't have been knelling
you mayn't have been knelling
they mayn't have been knelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I knell?
may you knell?
may he knell?
may we knell?
may you knell?
may they knell? 	may I be knelling?
may you be knelling?
may he be knelling?
may we be knelling?
may you be knelling?
may they be knelling? 	may I have knelled?
may you have knelled?
may he have knelled?
may we have knelled?
may you have knelled?
may they have knelled? 	may I have been knelling?
may you have been knelling?
may he have been knelling?
may we have been knelling?
may you have been knelling?
may they have been knelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I knell?
mayn't you knell?
mayn't he knell?
mayn't we knell?
mayn't you knell?
mayn't they knell? 	mayn't I be knelling?
mayn't you be knelling?
mayn't he be knelling?
mayn't we be knelling?
mayn't you be knelling?
mayn't they be knelling? 	mayn't I have knelled?
mayn't you have knelled?
mayn't he have knelled?
mayn't we have knelled?
mayn't you have knelled?
mayn't they have knelled? 	mayn't I have been knelling?
mayn't you have been knelling?
mayn't he have been knelling?
mayn't we have been knelling?
mayn't you have been knelling?
mayn't they have been knelling?