I can forswear you can forswear she can forswear we can forswear you can forswear they can forswear
V-ing form
I can be forswearing you can be forswearing she can be forswearing we can be forswearing you can be forswearing they can be forswearing
Perfect
I can have forsworn you can have forsworn she can have forsworn we can have forsworn you can have forsworn they can have forsworn
V-ing perfect
I can have been forswearing you can have been forswearing she can have been forswearing we can have been forswearing you can have been forswearing they can have been forswearing
Negation
Simple form
I can't forswear you can't forswear she can't forswear we can't forswear you can't forswear they can't forswear
V-ing form
I can't be forswearing you can't be forswearing she can't be forswearing we can't be forswearing you can't be forswearing they can't be forswearing
Perfect
I can't have forsworn you can't have forsworn she can't have forsworn we can't have forsworn you can't have forsworn they can't have forsworn
V-ing perfect
I can't have been forswearing you can't have been forswearing she can't have been forswearing we can't have been forswearing you can't have been forswearing they can't have been forswearing
Interrogative form
Simple form
can I forswear? can you forswear? can she forswear? can we forswear? can you forswear? can they forswear?
V-ing form
can I be forswearing? can you be forswearing? can she be forswearing? can we be forswearing? can you be forswearing? can they be forswearing?
Perfect
can I have forsworn? can you have forsworn? can she have forsworn? can we have forsworn? can you have forsworn? can they have forsworn?
V-ing perfect
can I have been forswearing? can you have been forswearing? can she have been forswearing? can we have been forswearing? can you have been forswearing? can they have been forswearing?
Interro-negative form
Simple form
can't I forswear? can't you forswear? can't she forswear? can't we forswear? can't you forswear? can't they forswear?
V-ing form
can't I be forswearing? can't you be forswearing? can't she be forswearing? can't we be forswearing? can't you be forswearing? can't they be forswearing?
Perfect
can't I have forsworn? can't you have forsworn? can't she have forsworn? can't we have forsworn? can't you have forsworn? can't they have forsworn?
V-ing perfect
can't I have been forswearing? can't you have been forswearing? can't she have been forswearing? can't we have been forswearing? can't you have been forswearing? can't they have been forswearing?