I can portage you can portage he can portage we can portage you can portage they can portage
V-ing form
I can be portaging you can be portaging he can be portaging we can be portaging you can be portaging they can be portaging
Perfect
I can have portaged you can have portaged he can have portaged we can have portaged you can have portaged they can have portaged
V-ing perfect
I can have been portaging you can have been portaging he can have been portaging we can have been portaging you can have been portaging they can have been portaging
Negation
Simple form
I can't portage you can't portage he can't portage we can't portage you can't portage they can't portage
V-ing form
I can't be portaging you can't be portaging he can't be portaging we can't be portaging you can't be portaging they can't be portaging
Perfect
I can't have portaged you can't have portaged he can't have portaged we can't have portaged you can't have portaged they can't have portaged
V-ing perfect
I can't have been portaging you can't have been portaging he can't have been portaging we can't have been portaging you can't have been portaging they can't have been portaging
Interrogative form
Simple form
can I portage? can you portage? can he portage? can we portage? can you portage? can they portage?
V-ing form
can I be portaging? can you be portaging? can he be portaging? can we be portaging? can you be portaging? can they be portaging?
Perfect
can I have portaged? can you have portaged? can he have portaged? can we have portaged? can you have portaged? can they have portaged?
V-ing perfect
can I have been portaging? can you have been portaging? can he have been portaging? can we have been portaging? can you have been portaging? can they have been portaging?
Interro-negative form
Simple form
can't I portage? can't you portage? can't he portage? can't we portage? can't you portage? can't they portage?
V-ing form
can't I be portaging? can't you be portaging? can't he be portaging? can't we be portaging? can't you be portaging? can't they be portaging?
Perfect
can't I have portaged? can't you have portaged? can't he have portaged? can't we have portaged? can't you have portaged? can't they have portaged?
V-ing perfect
can't I have been portaging? can't you have been portaging? can't he have been portaging? can't we have been portaging? can't you have been portaging? can't they have been portaging?