may tighten
Verbo regolare: tighten - tightened- tightened

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I may tighten
you may tighten
she may tighten
we may tighten
you may tighten
they may tighten 	I may be tightening
you may be tightening
she may be tightening
we may be tightening
you may be tightening
they may be tightening	I may have tightened
you may have tightened
she may have tightened
we may have tightened
you may have tightened
they may have tightened	I may have been tightening
you may have been tightening
she may have been tightening
we may have been tightening
you may have been tightening
they may have been tightening	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I may not tighten
you may not tighten
she may not tighten
we may not tighten
you may not tighten
they may not tighten 	I may not be tightening
you may not be tightening
she may not be tightening
we may not be tightening
you may not be tightening
they may not be tightening	I may not have tightened
you may not have tightened
she may not have tightened
we may not have tightened
you may not have tightened
they may not have tightened	I may not have been tightening
you may not have been tightening
she may not have been tightening
we may not have been tightening
you may not have been tightening
they may not have been tightening	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
may I tighten?
may you tighten?
may she tighten?
may we tighten?
may you tighten?
may they tighten? 	may I be tightening?
may you be tightening?
may she be tightening?
may we be tightening?
may you be tightening?
may they be tightening? 	may I have tightened?
may you have tightened?
may she have tightened?
may we have tightened?
may you have tightened?
may they have tightened? 	may I have been tightening?
may you have been tightening?
may she have been tightening?
may we have been tightening?
may you have been tightening?
may they have been tightening? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
may I not tighten?
may you not tighten?
may she not tighten?
may we not tighten?
may you not tighten?
may they not tighten? 	may I not be tightening?
may you not be tightening?
may she not be tightening?
may we not be tightening?
may you not be tightening?
may they not be tightening? 	may I not have tightened?
may you not have tightened?
may she not have tightened?
may we not have tightened?
may you not have tightened?
may they not have tightened? 	may I not have been tightening?
may you not have been tightening?
may she not have been tightening?
may we not have been tightening?
may you not have been tightening?
may they not have been tightening?