may countersink
Irregular verb: countersink - countersank- countersunk

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may countersink
you may countersink
she may countersink
we may countersink
you may countersink
they may countersink 	I may be countersinking
you may be countersinking
she may be countersinking
we may be countersinking
you may be countersinking
they may be countersinking	I may have countersunk
you may have countersunk
she may have countersunk
we may have countersunk
you may have countersunk
they may have countersunk	I may have been countersinking
you may have been countersinking
she may have been countersinking
we may have been countersinking
you may have been countersinking
they may have been countersinking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not countersink
you may not countersink
she may not countersink
we may not countersink
you may not countersink
they may not countersink 	I may not be countersinking
you may not be countersinking
she may not be countersinking
we may not be countersinking
you may not be countersinking
they may not be countersinking	I may not have countersunk
you may not have countersunk
she may not have countersunk
we may not have countersunk
you may not have countersunk
they may not have countersunk	I may not have been countersinking
you may not have been countersinking
she may not have been countersinking
we may not have been countersinking
you may not have been countersinking
they may not have been countersinking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I countersink?
may you countersink?
may she countersink?
may we countersink?
may you countersink?
may they countersink? 	may I be countersinking?
may you be countersinking?
may she be countersinking?
may we be countersinking?
may you be countersinking?
may they be countersinking? 	may I have countersunk?
may you have countersunk?
may she have countersunk?
may we have countersunk?
may you have countersunk?
may they have countersunk? 	may I have been countersinking?
may you have been countersinking?
may she have been countersinking?
may we have been countersinking?
may you have been countersinking?
may they have been countersinking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not countersink?
may you not countersink?
may she not countersink?
may we not countersink?
may you not countersink?
may they not countersink? 	may I not be countersinking?
may you not be countersinking?
may she not be countersinking?
may we not be countersinking?
may you not be countersinking?
may they not be countersinking? 	may I not have countersunk?
may you not have countersunk?
may she not have countersunk?
may we not have countersunk?
may you not have countersunk?
may they not have countersunk? 	may I not have been countersinking?
may you not have been countersinking?
may she not have been countersinking?
may we not have been countersinking?
may you not have been countersinking?
may they not have been countersinking?