I can decussate you can decussate he can decussate we can decussate you can decussate they can decussate
V-ing form
I can be decussating you can be decussating he can be decussating we can be decussating you can be decussating they can be decussating
Perfect
I can have decussated you can have decussated he can have decussated we can have decussated you can have decussated they can have decussated
V-ing perfect
I can have been decussating you can have been decussating he can have been decussating we can have been decussating you can have been decussating they can have been decussating
Negation
Simple form
I can't decussate you can't decussate he can't decussate we can't decussate you can't decussate they can't decussate
V-ing form
I can't be decussating you can't be decussating he can't be decussating we can't be decussating you can't be decussating they can't be decussating
Perfect
I can't have decussated you can't have decussated he can't have decussated we can't have decussated you can't have decussated they can't have decussated
V-ing perfect
I can't have been decussating you can't have been decussating he can't have been decussating we can't have been decussating you can't have been decussating they can't have been decussating
Interrogative form
Simple form
can I decussate? can you decussate? can he decussate? can we decussate? can you decussate? can they decussate?
V-ing form
can I be decussating? can you be decussating? can he be decussating? can we be decussating? can you be decussating? can they be decussating?
Perfect
can I have decussated? can you have decussated? can he have decussated? can we have decussated? can you have decussated? can they have decussated?
V-ing perfect
can I have been decussating? can you have been decussating? can he have been decussating? can we have been decussating? can you have been decussating? can they have been decussating?
Interro-negative form
Simple form
can't I decussate? can't you decussate? can't he decussate? can't we decussate? can't you decussate? can't they decussate?
V-ing form
can't I be decussating? can't you be decussating? can't he be decussating? can't we be decussating? can't you be decussating? can't they be decussating?
Perfect
can't I have decussated? can't you have decussated? can't he have decussated? can't we have decussated? can't you have decussated? can't they have decussated?
V-ing perfect
can't I have been decussating? can't you have been decussating? can't he have been decussating? can't we have been decussating? can't you have been decussating? can't they have been decussating?