I can deteriorate you can deteriorate he can deteriorate we can deteriorate you can deteriorate they can deteriorate
V-ing form
I can be deteriorating you can be deteriorating he can be deteriorating we can be deteriorating you can be deteriorating they can be deteriorating
Perfect
I can have deteriorated you can have deteriorated he can have deteriorated we can have deteriorated you can have deteriorated they can have deteriorated
V-ing perfect
I can have been deteriorating you can have been deteriorating he can have been deteriorating we can have been deteriorating you can have been deteriorating they can have been deteriorating
Negation
Simple form
I cannot deteriorate you cannot deteriorate he cannot deteriorate we cannot deteriorate you cannot deteriorate they cannot deteriorate
V-ing form
I cannot be deteriorating you cannot be deteriorating he cannot be deteriorating we cannot be deteriorating you cannot be deteriorating they cannot be deteriorating
Perfect
I cannot have deteriorated you cannot have deteriorated he cannot have deteriorated we cannot have deteriorated you cannot have deteriorated they cannot have deteriorated
V-ing perfect
I cannot have been deteriorating you cannot have been deteriorating he cannot have been deteriorating we cannot have been deteriorating you cannot have been deteriorating they cannot have been deteriorating
Interrogative form
Simple form
can I deteriorate? can you deteriorate? can he deteriorate? can we deteriorate? can you deteriorate? can they deteriorate?
V-ing form
can I be deteriorating? can you be deteriorating? can he be deteriorating? can we be deteriorating? can you be deteriorating? can they be deteriorating?
Perfect
can I have deteriorated? can you have deteriorated? can he have deteriorated? can we have deteriorated? can you have deteriorated? can they have deteriorated?
V-ing perfect
can I have been deteriorating? can you have been deteriorating? can he have been deteriorating? can we have been deteriorating? can you have been deteriorating? can they have been deteriorating?
Interro-negative form
Simple form
can I not deteriorate? can you not deteriorate? can he not deteriorate? can we not deteriorate? can you not deteriorate? can they not deteriorate?
V-ing form
can I not be deteriorating? can you not be deteriorating? can he not be deteriorating? can we not be deteriorating? can you not be deteriorating? can they not be deteriorating?
Perfect
can I not have deteriorated? can you not have deteriorated? can he not have deteriorated? can we not have deteriorated? can you not have deteriorated? can they not have deteriorated?
V-ing perfect
can I not have been deteriorating? can you not have been deteriorating? can he not have been deteriorating? can we not have been deteriorating? can you not have been deteriorating? can they not have been deteriorating?