English verb conjugation
COULD AIRLIFT

Regular verb: airlift - airlifted - airlifted

Affirmation

Simple form	V-ing form
I could airlift you could airlift he could airlift we could airlift you could airlift they could airlift	I could be airlifting you could be airlifting he 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 he 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 he 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 couldn't airlift you couldn't airlift he couldn't airlift we couldn't airlift you couldn't airlift they couldn't airlift	I couldn't be airlifting you couldn't be airlifting he couldn't be airlifting we couldn't be airlifting you couldn't be airlifting they couldn't be airlifting
Perfect	V-ing perfect
I couldn't have airlifted you couldn't have airlifted he couldn't have airlifted we couldn't have airlifted you couldn't have airlifted they couldn't have airlifted	I couldn't have been airlifting you couldn't have been airlifting he couldn't have been airlifting we couldn't have been airlifting you couldn't have been airlifting they couldn't have been airlifting

Interrogative form

Simple form	V-ing form
could I airlift? could you airlift? could he airlift? could we airlift? could you airlift? could they airlift?	could I be airlifting? could you be airlifting? could he 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 he 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 he 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
couldn't I airlift? couldn't you airlift? couldn't he airlift? couldn't we airlift? couldn't you airlift? couldn't they airlift?	couldn't I be airlifting? couldn't you be airlifting? couldn't he be airlifting? couldn't we be airlifting? couldn't you be airlifting? couldn't they be airlifting?
Perfect	V-ing perfect
couldn't I have airlifted? couldn't you have airlifted? couldn't he have airlifted? couldn't we have airlifted? couldn't you have airlifted? couldn't they have airlifted?	couldn't I have been airlifting? couldn't you have been airlifting? couldn't he have been airlifting? couldn't we have been airlifting? couldn't you have been airlifting? couldn't they have been airlifting?