may quiver
Regular verb: quiver - quivered- quivered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may quiver
you may quiver
he may quiver
we may quiver
you may quiver
they may quiver 	I may be quivering
you may be quivering
he may be quivering
we may be quivering
you may be quivering
they may be quivering	I may have quivered
you may have quivered
he may have quivered
we may have quivered
you may have quivered
they may have quivered	I may have been quivering
you may have been quivering
he may have been quivering
we may have been quivering
you may have been quivering
they may have been quivering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't quiver
you mayn't quiver
he mayn't quiver
we mayn't quiver
you mayn't quiver
they mayn't quiver 	I mayn't be quivering
you mayn't be quivering
he mayn't be quivering
we mayn't be quivering
you mayn't be quivering
they mayn't be quivering	I mayn't have quivered
you mayn't have quivered
he mayn't have quivered
we mayn't have quivered
you mayn't have quivered
they mayn't have quivered	I mayn't have been quivering
you mayn't have been quivering
he mayn't have been quivering
we mayn't have been quivering
you mayn't have been quivering
they mayn't have been quivering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I quiver?
may you quiver?
may he quiver?
may we quiver?
may you quiver?
may they quiver? 	may I be quivering?
may you be quivering?
may he be quivering?
may we be quivering?
may you be quivering?
may they be quivering? 	may I have quivered?
may you have quivered?
may he have quivered?
may we have quivered?
may you have quivered?
may they have quivered? 	may I have been quivering?
may you have been quivering?
may he have been quivering?
may we have been quivering?
may you have been quivering?
may they have been quivering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I quiver?
mayn't you quiver?
mayn't he quiver?
mayn't we quiver?
mayn't you quiver?
mayn't they quiver? 	mayn't I be quivering?
mayn't you be quivering?
mayn't he be quivering?
mayn't we be quivering?
mayn't you be quivering?
mayn't they be quivering? 	mayn't I have quivered?
mayn't you have quivered?
mayn't he have quivered?
mayn't we have quivered?
mayn't you have quivered?
mayn't they have quivered? 	mayn't I have been quivering?
mayn't you have been quivering?
mayn't he have been quivering?
mayn't we have been quivering?
mayn't you have been quivering?
mayn't they have been quivering?