may straighten
Regular verb: straighten - straightened- straightened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may straighten
you may straighten
he may straighten
we may straighten
you may straighten
they may straighten 	I may be straightening
you may be straightening
he may be straightening
we may be straightening
you may be straightening
they may be straightening	I may have straightened
you may have straightened
he may have straightened
we may have straightened
you may have straightened
they may have straightened	I may have been straightening
you may have been straightening
he may have been straightening
we may have been straightening
you may have been straightening
they may have been straightening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't straighten
you mayn't straighten
he mayn't straighten
we mayn't straighten
you mayn't straighten
they mayn't straighten 	I mayn't be straightening
you mayn't be straightening
he mayn't be straightening
we mayn't be straightening
you mayn't be straightening
they mayn't be straightening	I mayn't have straightened
you mayn't have straightened
he mayn't have straightened
we mayn't have straightened
you mayn't have straightened
they mayn't have straightened	I mayn't have been straightening
you mayn't have been straightening
he mayn't have been straightening
we mayn't have been straightening
you mayn't have been straightening
they mayn't have been straightening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I straighten?
may you straighten?
may he straighten?
may we straighten?
may you straighten?
may they straighten? 	may I be straightening?
may you be straightening?
may he be straightening?
may we be straightening?
may you be straightening?
may they be straightening? 	may I have straightened?
may you have straightened?
may he have straightened?
may we have straightened?
may you have straightened?
may they have straightened? 	may I have been straightening?
may you have been straightening?
may he have been straightening?
may we have been straightening?
may you have been straightening?
may they have been straightening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I straighten?
mayn't you straighten?
mayn't he straighten?
mayn't we straighten?
mayn't you straighten?
mayn't they straighten? 	mayn't I be straightening?
mayn't you be straightening?
mayn't he be straightening?
mayn't we be straightening?
mayn't you be straightening?
mayn't they be straightening? 	mayn't I have straightened?
mayn't you have straightened?
mayn't he have straightened?
mayn't we have straightened?
mayn't you have straightened?
mayn't they have straightened? 	mayn't I have been straightening?
mayn't you have been straightening?
mayn't he have been straightening?
mayn't we have been straightening?
mayn't you have been straightening?
mayn't they have been straightening?