may tremble
Regular verb: tremble - trembled- trembled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may tremble
you may tremble
she may tremble
we may tremble
you may tremble
they may tremble 	I may be trembling
you may be trembling
she may be trembling
we may be trembling
you may be trembling
they may be trembling	I may have trembled
you may have trembled
she may have trembled
we may have trembled
you may have trembled
they may have trembled	I may have been trembling
you may have been trembling
she may have been trembling
we may have been trembling
you may have been trembling
they may have been trembling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't tremble
you mayn't tremble
she mayn't tremble
we mayn't tremble
you mayn't tremble
they mayn't tremble 	I mayn't be trembling
you mayn't be trembling
she mayn't be trembling
we mayn't be trembling
you mayn't be trembling
they mayn't be trembling	I mayn't have trembled
you mayn't have trembled
she mayn't have trembled
we mayn't have trembled
you mayn't have trembled
they mayn't have trembled	I mayn't have been trembling
you mayn't have been trembling
she mayn't have been trembling
we mayn't have been trembling
you mayn't have been trembling
they mayn't have been trembling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I tremble?
may you tremble?
may she tremble?
may we tremble?
may you tremble?
may they tremble? 	may I be trembling?
may you be trembling?
may she be trembling?
may we be trembling?
may you be trembling?
may they be trembling? 	may I have trembled?
may you have trembled?
may she have trembled?
may we have trembled?
may you have trembled?
may they have trembled? 	may I have been trembling?
may you have been trembling?
may she have been trembling?
may we have been trembling?
may you have been trembling?
may they have been trembling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I tremble?
mayn't you tremble?
mayn't she tremble?
mayn't we tremble?
mayn't you tremble?
mayn't they tremble? 	mayn't I be trembling?
mayn't you be trembling?
mayn't she be trembling?
mayn't we be trembling?
mayn't you be trembling?
mayn't they be trembling? 	mayn't I have trembled?
mayn't you have trembled?
mayn't she have trembled?
mayn't we have trembled?
mayn't you have trembled?
mayn't they have trembled? 	mayn't I have been trembling?
mayn't you have been trembling?
mayn't she have been trembling?
mayn't we have been trembling?
mayn't you have been trembling?
mayn't they have been trembling?