may caution
Regular verb: caution - cautioned- cautioned

Affirmation 	
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I may caution
you may caution
she may caution
we may caution
you may caution
they may caution 	I may be cautioning
you may be cautioning
she may be cautioning
we may be cautioning
you may be cautioning
they may be cautioning	I may have cautioned
you may have cautioned
she may have cautioned
we may have cautioned
you may have cautioned
they may have cautioned	I may have been cautioning
you may have been cautioning
she may have been cautioning
we may have been cautioning
you may have been cautioning
they may have been cautioning	

Negation 	
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I mayn't caution
you mayn't caution
she mayn't caution
we mayn't caution
you mayn't caution
they mayn't caution 	I mayn't be cautioning
you mayn't be cautioning
she mayn't be cautioning
we mayn't be cautioning
you mayn't be cautioning
they mayn't be cautioning	I mayn't have cautioned
you mayn't have cautioned
she mayn't have cautioned
we mayn't have cautioned
you mayn't have cautioned
they mayn't have cautioned	I mayn't have been cautioning
you mayn't have been cautioning
she mayn't have been cautioning
we mayn't have been cautioning
you mayn't have been cautioning
they mayn't have been cautioning	

Interrogative form 	
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may I caution?
may you caution?
may she caution?
may we caution?
may you caution?
may they caution? 	may I be cautioning?
may you be cautioning?
may she be cautioning?
may we be cautioning?
may you be cautioning?
may they be cautioning? 	may I have cautioned?
may you have cautioned?
may she have cautioned?
may we have cautioned?
may you have cautioned?
may they have cautioned? 	may I have been cautioning?
may you have been cautioning?
may she have been cautioning?
may we have been cautioning?
may you have been cautioning?
may they have been cautioning? 	

Interro-negative form 	
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mayn't I caution?
mayn't you caution?
mayn't she caution?
mayn't we caution?
mayn't you caution?
mayn't they caution? 	mayn't I be cautioning?
mayn't you be cautioning?
mayn't she be cautioning?
mayn't we be cautioning?
mayn't you be cautioning?
mayn't they be cautioning? 	mayn't I have cautioned?
mayn't you have cautioned?
mayn't she have cautioned?
mayn't we have cautioned?
mayn't you have cautioned?
mayn't they have cautioned? 	mayn't I have been cautioning?
mayn't you have been cautioning?
mayn't she have been cautioning?
mayn't we have been cautioning?
mayn't you have been cautioning?
mayn't they have been cautioning?