I can digest you can digest he can digest we can digest you can digest they can digest
V-ing form
I can be digesting you can be digesting he can be digesting we can be digesting you can be digesting they can be digesting
Perfect
I can have digested you can have digested he can have digested we can have digested you can have digested they can have digested
V-ing perfect
I can have been digesting you can have been digesting he can have been digesting we can have been digesting you can have been digesting they can have been digesting
Negation
Simple form
I can't digest you can't digest he can't digest we can't digest you can't digest they can't digest
V-ing form
I can't be digesting you can't be digesting he can't be digesting we can't be digesting you can't be digesting they can't be digesting
Perfect
I can't have digested you can't have digested he can't have digested we can't have digested you can't have digested they can't have digested
V-ing perfect
I can't have been digesting you can't have been digesting he can't have been digesting we can't have been digesting you can't have been digesting they can't have been digesting
Interrogative form
Simple form
can I digest? can you digest? can he digest? can we digest? can you digest? can they digest?
V-ing form
can I be digesting? can you be digesting? can he be digesting? can we be digesting? can you be digesting? can they be digesting?
Perfect
can I have digested? can you have digested? can he have digested? can we have digested? can you have digested? can they have digested?
V-ing perfect
can I have been digesting? can you have been digesting? can he have been digesting? can we have been digesting? can you have been digesting? can they have been digesting?
Interro-negative form
Simple form
can't I digest? can't you digest? can't he digest? can't we digest? can't you digest? can't they digest?
V-ing form
can't I be digesting? can't you be digesting? can't he be digesting? can't we be digesting? can't you be digesting? can't they be digesting?
Perfect
can't I have digested? can't you have digested? can't he have digested? can't we have digested? can't you have digested? can't they have digested?
V-ing perfect
can't I have been digesting? can't you have been digesting? can't he have been digesting? can't we have been digesting? can't you have been digesting? can't they have been digesting?