may thwart
Regular verb: thwart - thwarted- thwarted

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may thwart
you may thwart
he may thwart
we may thwart
you may thwart
they may thwart 	I may be thwarting
you may be thwarting
he may be thwarting
we may be thwarting
you may be thwarting
they may be thwarting	I may have thwarted
you may have thwarted
he may have thwarted
we may have thwarted
you may have thwarted
they may have thwarted	I may have been thwarting
you may have been thwarting
he may have been thwarting
we may have been thwarting
you may have been thwarting
they may have been thwarting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't thwart
you mayn't thwart
he mayn't thwart
we mayn't thwart
you mayn't thwart
they mayn't thwart 	I mayn't be thwarting
you mayn't be thwarting
he mayn't be thwarting
we mayn't be thwarting
you mayn't be thwarting
they mayn't be thwarting	I mayn't have thwarted
you mayn't have thwarted
he mayn't have thwarted
we mayn't have thwarted
you mayn't have thwarted
they mayn't have thwarted	I mayn't have been thwarting
you mayn't have been thwarting
he mayn't have been thwarting
we mayn't have been thwarting
you mayn't have been thwarting
they mayn't have been thwarting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I thwart?
may you thwart?
may he thwart?
may we thwart?
may you thwart?
may they thwart? 	may I be thwarting?
may you be thwarting?
may he be thwarting?
may we be thwarting?
may you be thwarting?
may they be thwarting? 	may I have thwarted?
may you have thwarted?
may he have thwarted?
may we have thwarted?
may you have thwarted?
may they have thwarted? 	may I have been thwarting?
may you have been thwarting?
may he have been thwarting?
may we have been thwarting?
may you have been thwarting?
may they have been thwarting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I thwart?
mayn't you thwart?
mayn't he thwart?
mayn't we thwart?
mayn't you thwart?
mayn't they thwart? 	mayn't I be thwarting?
mayn't you be thwarting?
mayn't he be thwarting?
mayn't we be thwarting?
mayn't you be thwarting?
mayn't they be thwarting? 	mayn't I have thwarted?
mayn't you have thwarted?
mayn't he have thwarted?
mayn't we have thwarted?
mayn't you have thwarted?
mayn't they have thwarted? 	mayn't I have been thwarting?
mayn't you have been thwarting?
mayn't he have been thwarting?
mayn't we have been thwarting?
mayn't you have been thwarting?
mayn't they have been thwarting?