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 couldn't overnight you couldn't overnight she couldn't overnight we couldn't overnight you couldn't overnight they couldn't overnight	I couldn't be overnighting you couldn't be overnighting she couldn't be overnighting we couldn't be overnighting you couldn't be overnighting they couldn't be overnighting
Perfect	V-ing perfect
I couldn't have overnighted you couldn't have overnighted she couldn't have overnighted we couldn't have overnighted you couldn't have overnighted they couldn't have overnighted	I couldn't have been overnighting you couldn't have been overnighting she couldn't have been overnighting we couldn't have been overnighting you couldn't have been overnighting they couldn't 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
couldn't I overnight? couldn't you overnight? couldn't she overnight? couldn't we overnight? couldn't you overnight? couldn't they overnight?	couldn't I be overnighting? couldn't you be overnighting? couldn't she be overnighting? couldn't we be overnighting? couldn't you be overnighting? couldn't they be overnighting?
Perfect	V-ing perfect
couldn't I have overnighted? couldn't you have overnighted? couldn't she have overnighted? couldn't we have overnighted? couldn't you have overnighted? couldn't they have overnighted?	couldn't I have been overnighting? couldn't you have been overnighting? couldn't she have been overnighting? couldn't we have been overnighting? couldn't you have been overnighting? couldn't they have been overnighting?