may thwack
Regular verb: thwack - thwacked- thwacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may thwack
you may thwack
she may thwack
we may thwack
you may thwack
they may thwack 	I may be thwacking
you may be thwacking
she may be thwacking
we may be thwacking
you may be thwacking
they may be thwacking	I may have thwacked
you may have thwacked
she may have thwacked
we may have thwacked
you may have thwacked
they may have thwacked	I may have been thwacking
you may have been thwacking
she may have been thwacking
we may have been thwacking
you may have been thwacking
they may have been thwacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may not thwack
you may not thwack
she may not thwack
we may not thwack
you may not thwack
they may not thwack 	I may not be thwacking
you may not be thwacking
she may not be thwacking
we may not be thwacking
you may not be thwacking
they may not be thwacking	I may not have thwacked
you may not have thwacked
she may not have thwacked
we may not have thwacked
you may not have thwacked
they may not have thwacked	I may not have been thwacking
you may not have been thwacking
she may not have been thwacking
we may not have been thwacking
you may not have been thwacking
they may not have been thwacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I thwack?
may you thwack?
may she thwack?
may we thwack?
may you thwack?
may they thwack? 	may I be thwacking?
may you be thwacking?
may she be thwacking?
may we be thwacking?
may you be thwacking?
may they be thwacking? 	may I have thwacked?
may you have thwacked?
may she have thwacked?
may we have thwacked?
may you have thwacked?
may they have thwacked? 	may I have been thwacking?
may you have been thwacking?
may she have been thwacking?
may we have been thwacking?
may you have been thwacking?
may they have been thwacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I not thwack?
may you not thwack?
may she not thwack?
may we not thwack?
may you not thwack?
may they not thwack? 	may I not be thwacking?
may you not be thwacking?
may she not be thwacking?
may we not be thwacking?
may you not be thwacking?
may they not be thwacking? 	may I not have thwacked?
may you not have thwacked?
may she not have thwacked?
may we not have thwacked?
may you not have thwacked?
may they not have thwacked? 	may I not have been thwacking?
may you not have been thwacking?
may she not have been thwacking?
may we not have been thwacking?
may you not have been thwacking?
may they not have been thwacking?