English verb conjugation
COULD LONG

Regular verb: long - longed - longed

Affirmation

Simple form	V-ing form
I could long you could long he could long we could long you could long they could long	I could be longing you could be longing he could be longing we could be longing you could be longing they could be longing
Perfect	V-ing perfect
I could have longed you could have longed he could have longed we could have longed you could have longed they could have longed	I could have been longing you could have been longing he could have been longing we could have been longing you could have been longing they could have been longing

Negation

Simple form	V-ing form
I couldn't long you couldn't long he couldn't long we couldn't long you couldn't long they couldn't long	I couldn't be longing you couldn't be longing he couldn't be longing we couldn't be longing you couldn't be longing they couldn't be longing
Perfect	V-ing perfect
I couldn't have longed you couldn't have longed he couldn't have longed we couldn't have longed you couldn't have longed they couldn't have longed	I couldn't have been longing you couldn't have been longing he couldn't have been longing we couldn't have been longing you couldn't have been longing they couldn't have been longing

Interrogative form

Simple form	V-ing form
could I long? could you long? could he long? could we long? could you long? could they long?	could I be longing? could you be longing? could he be longing? could we be longing? could you be longing? could they be longing?
Perfect	V-ing perfect
could I have longed? could you have longed? could he have longed? could we have longed? could you have longed? could they have longed?	could I have been longing? could you have been longing? could he have been longing? could we have been longing? could you have been longing? could they have been longing?

Interro-negative form

Simple form	V-ing form
couldn't I long? couldn't you long? couldn't he long? couldn't we long? couldn't you long? couldn't they long?	couldn't I be longing? couldn't you be longing? couldn't he be longing? couldn't we be longing? couldn't you be longing? couldn't they be longing?
Perfect	V-ing perfect
couldn't I have longed? couldn't you have longed? couldn't he have longed? couldn't we have longed? couldn't you have longed? couldn't they have longed?	couldn't I have been longing? couldn't you have been longing? couldn't he have been longing? couldn't we have been longing? couldn't you have been longing? couldn't they have been longing?