I can underlie you can underlie he can underlie we can underlie you can underlie they can underlie
V-ing form
I can be underlying you can be underlying he can be underlying we can be underlying you can be underlying they can be underlying
Perfect
I can have underlain you can have underlain he can have underlain we can have underlain you can have underlain they can have underlain
V-ing perfect
I can have been underlying you can have been underlying he can have been underlying we can have been underlying you can have been underlying they can have been underlying
Negation
Simple form
I can't underlie you can't underlie he can't underlie we can't underlie you can't underlie they can't underlie
V-ing form
I can't be underlying you can't be underlying he can't be underlying we can't be underlying you can't be underlying they can't be underlying
Perfect
I can't have underlain you can't have underlain he can't have underlain we can't have underlain you can't have underlain they can't have underlain
V-ing perfect
I can't have been underlying you can't have been underlying he can't have been underlying we can't have been underlying you can't have been underlying they can't have been underlying
Interrogative form
Simple form
can I underlie? can you underlie? can he underlie? can we underlie? can you underlie? can they underlie?
V-ing form
can I be underlying? can you be underlying? can he be underlying? can we be underlying? can you be underlying? can they be underlying?
Perfect
can I have underlain? can you have underlain? can he have underlain? can we have underlain? can you have underlain? can they have underlain?
V-ing perfect
can I have been underlying? can you have been underlying? can he have been underlying? can we have been underlying? can you have been underlying? can they have been underlying?
Interro-negative form
Simple form
can't I underlie? can't you underlie? can't he underlie? can't we underlie? can't you underlie? can't they underlie?
V-ing form
can't I be underlying? can't you be underlying? can't he be underlying? can't we be underlying? can't you be underlying? can't they be underlying?
Perfect
can't I have underlain? can't you have underlain? can't he have underlain? can't we have underlain? can't you have underlain? can't they have underlain?
V-ing perfect
can't I have been underlying? can't you have been underlying? can't he have been underlying? can't we have been underlying? can't you have been underlying? can't they have been underlying?