may shift
Regular verb: shift - shifted- shifted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may shift
you may shift
she may shift
we may shift
you may shift
they may shift 	I may be shifting
you may be shifting
she may be shifting
we may be shifting
you may be shifting
they may be shifting	I may have shifted
you may have shifted
she may have shifted
we may have shifted
you may have shifted
they may have shifted	I may have been shifting
you may have been shifting
she may have been shifting
we may have been shifting
you may have been shifting
they may have been shifting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't shift
you mayn't shift
she mayn't shift
we mayn't shift
you mayn't shift
they mayn't shift 	I mayn't be shifting
you mayn't be shifting
she mayn't be shifting
we mayn't be shifting
you mayn't be shifting
they mayn't be shifting	I mayn't have shifted
you mayn't have shifted
she mayn't have shifted
we mayn't have shifted
you mayn't have shifted
they mayn't have shifted	I mayn't have been shifting
you mayn't have been shifting
she mayn't have been shifting
we mayn't have been shifting
you mayn't have been shifting
they mayn't have been shifting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I shift?
may you shift?
may she shift?
may we shift?
may you shift?
may they shift? 	may I be shifting?
may you be shifting?
may she be shifting?
may we be shifting?
may you be shifting?
may they be shifting? 	may I have shifted?
may you have shifted?
may she have shifted?
may we have shifted?
may you have shifted?
may they have shifted? 	may I have been shifting?
may you have been shifting?
may she have been shifting?
may we have been shifting?
may you have been shifting?
may they have been shifting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I shift?
mayn't you shift?
mayn't she shift?
mayn't we shift?
mayn't you shift?
mayn't they shift? 	mayn't I be shifting?
mayn't you be shifting?
mayn't she be shifting?
mayn't we be shifting?
mayn't you be shifting?
mayn't they be shifting? 	mayn't I have shifted?
mayn't you have shifted?
mayn't she have shifted?
mayn't we have shifted?
mayn't you have shifted?
mayn't they have shifted? 	mayn't I have been shifting?
mayn't you have been shifting?
mayn't she have been shifting?
mayn't we have been shifting?
mayn't you have been shifting?
mayn't they have been shifting?