may switchback
Regular verb: switchback - switchbacked- switchbacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may switchback
you may switchback
she may switchback
we may switchback
you may switchback
they may switchback 	I may be switchbacking
you may be switchbacking
she may be switchbacking
we may be switchbacking
you may be switchbacking
they may be switchbacking	I may have switchbacked
you may have switchbacked
she may have switchbacked
we may have switchbacked
you may have switchbacked
they may have switchbacked	I may have been switchbacking
you may have been switchbacking
she may have been switchbacking
we may have been switchbacking
you may have been switchbacking
they may have been switchbacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't switchback
you mayn't switchback
she mayn't switchback
we mayn't switchback
you mayn't switchback
they mayn't switchback 	I mayn't be switchbacking
you mayn't be switchbacking
she mayn't be switchbacking
we mayn't be switchbacking
you mayn't be switchbacking
they mayn't be switchbacking	I mayn't have switchbacked
you mayn't have switchbacked
she mayn't have switchbacked
we mayn't have switchbacked
you mayn't have switchbacked
they mayn't have switchbacked	I mayn't have been switchbacking
you mayn't have been switchbacking
she mayn't have been switchbacking
we mayn't have been switchbacking
you mayn't have been switchbacking
they mayn't have been switchbacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I switchback?
may you switchback?
may she switchback?
may we switchback?
may you switchback?
may they switchback? 	may I be switchbacking?
may you be switchbacking?
may she be switchbacking?
may we be switchbacking?
may you be switchbacking?
may they be switchbacking? 	may I have switchbacked?
may you have switchbacked?
may she have switchbacked?
may we have switchbacked?
may you have switchbacked?
may they have switchbacked? 	may I have been switchbacking?
may you have been switchbacking?
may she have been switchbacking?
may we have been switchbacking?
may you have been switchbacking?
may they have been switchbacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I switchback?
mayn't you switchback?
mayn't she switchback?
mayn't we switchback?
mayn't you switchback?
mayn't they switchback? 	mayn't I be switchbacking?
mayn't you be switchbacking?
mayn't she be switchbacking?
mayn't we be switchbacking?
mayn't you be switchbacking?
mayn't they be switchbacking? 	mayn't I have switchbacked?
mayn't you have switchbacked?
mayn't she have switchbacked?
mayn't we have switchbacked?
mayn't you have switchbacked?
mayn't they have switchbacked? 	mayn't I have been switchbacking?
mayn't you have been switchbacking?
mayn't she have been switchbacking?
mayn't we have been switchbacking?
mayn't you have been switchbacking?
mayn't they have been switchbacking?