English verb conjugation
COULD AIRLIFT

Regular verb: airlift - airlifted - airlifted

Affirmation

Simple form	V-ing form
I could airlift you could airlift she could airlift we could airlift you could airlift they could airlift	I could be airlifting you could be airlifting she could be airlifting we could be airlifting you could be airlifting they could be airlifting
Perfect	V-ing perfect
I could have airlifted you could have airlifted she could have airlifted we could have airlifted you could have airlifted they could have airlifted	I could have been airlifting you could have been airlifting she could have been airlifting we could have been airlifting you could have been airlifting they could have been airlifting

Negation

Simple form	V-ing form
I could not airlift you could not airlift she could not airlift we could not airlift you could not airlift they could not airlift	I could not be airlifting you could not be airlifting she could not be airlifting we could not be airlifting you could not be airlifting they could not be airlifting
Perfect	V-ing perfect
I could not have airlifted you could not have airlifted she could not have airlifted we could not have airlifted you could not have airlifted they could not have airlifted	I could not have been airlifting you could not have been airlifting she could not have been airlifting we could not have been airlifting you could not have been airlifting they could not have been airlifting

Interrogative form

Simple form	V-ing form
could I airlift? could you airlift? could she airlift? could we airlift? could you airlift? could they airlift?	could I be airlifting? could you be airlifting? could she be airlifting? could we be airlifting? could you be airlifting? could they be airlifting?
Perfect	V-ing perfect
could I have airlifted? could you have airlifted? could she have airlifted? could we have airlifted? could you have airlifted? could they have airlifted?	could I have been airlifting? could you have been airlifting? could she have been airlifting? could we have been airlifting? could you have been airlifting? could they have been airlifting?

Interro-negative form

Simple form	V-ing form
could I not airlift? could you not airlift? could she not airlift? could we not airlift? could you not airlift? could they not airlift?	could I not be airlifting? could you not be airlifting? could she not be airlifting? could we not be airlifting? could you not be airlifting? could they not be airlifting?
Perfect	V-ing perfect
could I not have airlifted? could you not have airlifted? could she not have airlifted? could we not have airlifted? could you not have airlifted? could they not have airlifted?	could I not have been airlifting? could you not have been airlifting? could she not have been airlifting? could we not have been airlifting? could you not have been airlifting? could they not have been airlifting?