may join
Regular verb: join - joined- joined

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may join
you may join
he may join
we may join
you may join
they may join 	I may be joining
you may be joining
he may be joining
we may be joining
you may be joining
they may be joining	I may have joined
you may have joined
he may have joined
we may have joined
you may have joined
they may have joined	I may have been joining
you may have been joining
he may have been joining
we may have been joining
you may have been joining
they may have been joining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't join
you mayn't join
he mayn't join
we mayn't join
you mayn't join
they mayn't join 	I mayn't be joining
you mayn't be joining
he mayn't be joining
we mayn't be joining
you mayn't be joining
they mayn't be joining	I mayn't have joined
you mayn't have joined
he mayn't have joined
we mayn't have joined
you mayn't have joined
they mayn't have joined	I mayn't have been joining
you mayn't have been joining
he mayn't have been joining
we mayn't have been joining
you mayn't have been joining
they mayn't have been joining	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I join?
may you join?
may he join?
may we join?
may you join?
may they join? 	may I be joining?
may you be joining?
may he be joining?
may we be joining?
may you be joining?
may they be joining? 	may I have joined?
may you have joined?
may he have joined?
may we have joined?
may you have joined?
may they have joined? 	may I have been joining?
may you have been joining?
may he have been joining?
may we have been joining?
may you have been joining?
may they have been joining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I join?
mayn't you join?
mayn't he join?
mayn't we join?
mayn't you join?
mayn't they join? 	mayn't I be joining?
mayn't you be joining?
mayn't he be joining?
mayn't we be joining?
mayn't you be joining?
mayn't they be joining? 	mayn't I have joined?
mayn't you have joined?
mayn't he have joined?
mayn't we have joined?
mayn't you have joined?
mayn't they have joined? 	mayn't I have been joining?
mayn't you have been joining?
mayn't he have been joining?
mayn't we have been joining?
mayn't you have been joining?
mayn't they have been joining?