I can infest you can infest he can infest we can infest you can infest they can infest
V-ing form
I can be infesting you can be infesting he can be infesting we can be infesting you can be infesting they can be infesting
Perfect
I can have infested you can have infested he can have infested we can have infested you can have infested they can have infested
V-ing perfect
I can have been infesting you can have been infesting he can have been infesting we can have been infesting you can have been infesting they can have been infesting
Negation
Simple form
I can't infest you can't infest he can't infest we can't infest you can't infest they can't infest
V-ing form
I can't be infesting you can't be infesting he can't be infesting we can't be infesting you can't be infesting they can't be infesting
Perfect
I can't have infested you can't have infested he can't have infested we can't have infested you can't have infested they can't have infested
V-ing perfect
I can't have been infesting you can't have been infesting he can't have been infesting we can't have been infesting you can't have been infesting they can't have been infesting
Interrogative form
Simple form
can I infest? can you infest? can he infest? can we infest? can you infest? can they infest?
V-ing form
can I be infesting? can you be infesting? can he be infesting? can we be infesting? can you be infesting? can they be infesting?
Perfect
can I have infested? can you have infested? can he have infested? can we have infested? can you have infested? can they have infested?
V-ing perfect
can I have been infesting? can you have been infesting? can he have been infesting? can we have been infesting? can you have been infesting? can they have been infesting?
Interro-negative form
Simple form
can't I infest? can't you infest? can't he infest? can't we infest? can't you infest? can't they infest?
V-ing form
can't I be infesting? can't you be infesting? can't he be infesting? can't we be infesting? can't you be infesting? can't they be infesting?
Perfect
can't I have infested? can't you have infested? can't he have infested? can't we have infested? can't you have infested? can't they have infested?
V-ing perfect
can't I have been infesting? can't you have been infesting? can't he have been infesting? can't we have been infesting? can't you have been infesting? can't they have been infesting?