may gratulate
Regular verb: gratulate - gratulated- gratulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may gratulate
you may gratulate
she may gratulate
we may gratulate
you may gratulate
they may gratulate 	I may be gratulating
you may be gratulating
she may be gratulating
we may be gratulating
you may be gratulating
they may be gratulating	I may have gratulated
you may have gratulated
she may have gratulated
we may have gratulated
you may have gratulated
they may have gratulated	I may have been gratulating
you may have been gratulating
she may have been gratulating
we may have been gratulating
you may have been gratulating
they may have been gratulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't gratulate
you mayn't gratulate
she mayn't gratulate
we mayn't gratulate
you mayn't gratulate
they mayn't gratulate 	I mayn't be gratulating
you mayn't be gratulating
she mayn't be gratulating
we mayn't be gratulating
you mayn't be gratulating
they mayn't be gratulating	I mayn't have gratulated
you mayn't have gratulated
she mayn't have gratulated
we mayn't have gratulated
you mayn't have gratulated
they mayn't have gratulated	I mayn't have been gratulating
you mayn't have been gratulating
she mayn't have been gratulating
we mayn't have been gratulating
you mayn't have been gratulating
they mayn't have been gratulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I gratulate?
may you gratulate?
may she gratulate?
may we gratulate?
may you gratulate?
may they gratulate? 	may I be gratulating?
may you be gratulating?
may she be gratulating?
may we be gratulating?
may you be gratulating?
may they be gratulating? 	may I have gratulated?
may you have gratulated?
may she have gratulated?
may we have gratulated?
may you have gratulated?
may they have gratulated? 	may I have been gratulating?
may you have been gratulating?
may she have been gratulating?
may we have been gratulating?
may you have been gratulating?
may they have been gratulating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I gratulate?
mayn't you gratulate?
mayn't she gratulate?
mayn't we gratulate?
mayn't you gratulate?
mayn't they gratulate? 	mayn't I be gratulating?
mayn't you be gratulating?
mayn't she be gratulating?
mayn't we be gratulating?
mayn't you be gratulating?
mayn't they be gratulating? 	mayn't I have gratulated?
mayn't you have gratulated?
mayn't she have gratulated?
mayn't we have gratulated?
mayn't you have gratulated?
mayn't they have gratulated? 	mayn't I have been gratulating?
mayn't you have been gratulating?
mayn't she have been gratulating?
mayn't we have been gratulating?
mayn't you have been gratulating?
mayn't they have been gratulating?