English verb conjugation
COULD OVERNIGHT

Regular verb: overnight - overnighted - overnighted

Affirmation

Simple form	V-ing form
I could overnight you could overnight she could overnight we could overnight you could overnight they could overnight	I could be overnighting you could be overnighting she could be overnighting we could be overnighting you could be overnighting they could be overnighting
Perfect	V-ing perfect
I could have overnighted you could have overnighted she could have overnighted we could have overnighted you could have overnighted they could have overnighted	I could have been overnighting you could have been overnighting she could have been overnighting we could have been overnighting you could have been overnighting they could have been overnighting

Negation

Simple form	V-ing form
I could not overnight you could not overnight she could not overnight we could not overnight you could not overnight they could not overnight	I could not be overnighting you could not be overnighting she could not be overnighting we could not be overnighting you could not be overnighting they could not be overnighting
Perfect	V-ing perfect
I could not have overnighted you could not have overnighted she could not have overnighted we could not have overnighted you could not have overnighted they could not have overnighted	I could not have been overnighting you could not have been overnighting she could not have been overnighting we could not have been overnighting you could not have been overnighting they could not have been overnighting

Interrogative form

Simple form	V-ing form
could I overnight? could you overnight? could she overnight? could we overnight? could you overnight? could they overnight?	could I be overnighting? could you be overnighting? could she be overnighting? could we be overnighting? could you be overnighting? could they be overnighting?
Perfect	V-ing perfect
could I have overnighted? could you have overnighted? could she have overnighted? could we have overnighted? could you have overnighted? could they have overnighted?	could I have been overnighting? could you have been overnighting? could she have been overnighting? could we have been overnighting? could you have been overnighting? could they have been overnighting?

Interro-negative form

Simple form	V-ing form
could I not overnight? could you not overnight? could she not overnight? could we not overnight? could you not overnight? could they not overnight?	could I not be overnighting? could you not be overnighting? could she not be overnighting? could we not be overnighting? could you not be overnighting? could they not be overnighting?
Perfect	V-ing perfect
could I not have overnighted? could you not have overnighted? could she not have overnighted? could we not have overnighted? could you not have overnighted? could they not have overnighted?	could I not have been overnighting? could you not have been overnighting? could she not have been overnighting? could we not have been overnighting? could you not have been overnighting? could they not have been overnighting?