English verb conjugation
CAN LONG

Regular verb: long - longed - longed

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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