may abstain
Regular verb: abstain - abstained- abstained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may abstain
you may abstain
he may abstain
we may abstain
you may abstain
they may abstain 	I may be abstaining
you may be abstaining
he may be abstaining
we may be abstaining
you may be abstaining
they may be abstaining	I may have abstained
you may have abstained
he may have abstained
we may have abstained
you may have abstained
they may have abstained	I may have been abstaining
you may have been abstaining
he may have been abstaining
we may have been abstaining
you may have been abstaining
they may have been abstaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't abstain
you mayn't abstain
he mayn't abstain
we mayn't abstain
you mayn't abstain
they mayn't abstain 	I mayn't be abstaining
you mayn't be abstaining
he mayn't be abstaining
we mayn't be abstaining
you mayn't be abstaining
they mayn't be abstaining	I mayn't have abstained
you mayn't have abstained
he mayn't have abstained
we mayn't have abstained
you mayn't have abstained
they mayn't have abstained	I mayn't have been abstaining
you mayn't have been abstaining
he mayn't have been abstaining
we mayn't have been abstaining
you mayn't have been abstaining
they mayn't have been abstaining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I abstain?
may you abstain?
may he abstain?
may we abstain?
may you abstain?
may they abstain? 	may I be abstaining?
may you be abstaining?
may he be abstaining?
may we be abstaining?
may you be abstaining?
may they be abstaining? 	may I have abstained?
may you have abstained?
may he have abstained?
may we have abstained?
may you have abstained?
may they have abstained? 	may I have been abstaining?
may you have been abstaining?
may he have been abstaining?
may we have been abstaining?
may you have been abstaining?
may they have been abstaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I abstain?
mayn't you abstain?
mayn't he abstain?
mayn't we abstain?
mayn't you abstain?
mayn't they abstain? 	mayn't I be abstaining?
mayn't you be abstaining?
mayn't he be abstaining?
mayn't we be abstaining?
mayn't you be abstaining?
mayn't they be abstaining? 	mayn't I have abstained?
mayn't you have abstained?
mayn't he have abstained?
mayn't we have abstained?
mayn't you have abstained?
mayn't they have abstained? 	mayn't I have been abstaining?
mayn't you have been abstaining?
mayn't he have been abstaining?
mayn't we have been abstaining?
mayn't you have been abstaining?
mayn't they have been abstaining?