may whistle
Regular verb: whistle - whistled- whistled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may whistle
you may whistle
she may whistle
we may whistle
you may whistle
they may whistle 	I may be whistling
you may be whistling
she may be whistling
we may be whistling
you may be whistling
they may be whistling	I may have whistled
you may have whistled
she may have whistled
we may have whistled
you may have whistled
they may have whistled	I may have been whistling
you may have been whistling
she may have been whistling
we may have been whistling
you may have been whistling
they may have been whistling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't whistle
you mayn't whistle
she mayn't whistle
we mayn't whistle
you mayn't whistle
they mayn't whistle 	I mayn't be whistling
you mayn't be whistling
she mayn't be whistling
we mayn't be whistling
you mayn't be whistling
they mayn't be whistling	I mayn't have whistled
you mayn't have whistled
she mayn't have whistled
we mayn't have whistled
you mayn't have whistled
they mayn't have whistled	I mayn't have been whistling
you mayn't have been whistling
she mayn't have been whistling
we mayn't have been whistling
you mayn't have been whistling
they mayn't have been whistling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I whistle?
may you whistle?
may she whistle?
may we whistle?
may you whistle?
may they whistle? 	may I be whistling?
may you be whistling?
may she be whistling?
may we be whistling?
may you be whistling?
may they be whistling? 	may I have whistled?
may you have whistled?
may she have whistled?
may we have whistled?
may you have whistled?
may they have whistled? 	may I have been whistling?
may you have been whistling?
may she have been whistling?
may we have been whistling?
may you have been whistling?
may they have been whistling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I whistle?
mayn't you whistle?
mayn't she whistle?
mayn't we whistle?
mayn't you whistle?
mayn't they whistle? 	mayn't I be whistling?
mayn't you be whistling?
mayn't she be whistling?
mayn't we be whistling?
mayn't you be whistling?
mayn't they be whistling? 	mayn't I have whistled?
mayn't you have whistled?
mayn't she have whistled?
mayn't we have whistled?
mayn't you have whistled?
mayn't they have whistled? 	mayn't I have been whistling?
mayn't you have been whistling?
mayn't she have been whistling?
mayn't we have been whistling?
mayn't you have been whistling?
mayn't they have been whistling?