I can reason you can reason he can reason we can reason you can reason they can reason
V-ing form
I can be reasoning you can be reasoning he can be reasoning we can be reasoning you can be reasoning they can be reasoning
Perfect
I can have reasoned you can have reasoned he can have reasoned we can have reasoned you can have reasoned they can have reasoned
V-ing perfect
I can have been reasoning you can have been reasoning he can have been reasoning we can have been reasoning you can have been reasoning they can have been reasoning
Negation
Simple form
I cannot reason you cannot reason he cannot reason we cannot reason you cannot reason they cannot reason
V-ing form
I cannot be reasoning you cannot be reasoning he cannot be reasoning we cannot be reasoning you cannot be reasoning they cannot be reasoning
Perfect
I cannot have reasoned you cannot have reasoned he cannot have reasoned we cannot have reasoned you cannot have reasoned they cannot have reasoned
V-ing perfect
I cannot have been reasoning you cannot have been reasoning he cannot have been reasoning we cannot have been reasoning you cannot have been reasoning they cannot have been reasoning
Interrogative form
Simple form
can I reason? can you reason? can he reason? can we reason? can you reason? can they reason?
V-ing form
can I be reasoning? can you be reasoning? can he be reasoning? can we be reasoning? can you be reasoning? can they be reasoning?
Perfect
can I have reasoned? can you have reasoned? can he have reasoned? can we have reasoned? can you have reasoned? can they have reasoned?
V-ing perfect
can I have been reasoning? can you have been reasoning? can he have been reasoning? can we have been reasoning? can you have been reasoning? can they have been reasoning?
Interro-negative form
Simple form
can I not reason? can you not reason? can he not reason? can we not reason? can you not reason? can they not reason?
V-ing form
can I not be reasoning? can you not be reasoning? can he not be reasoning? can we not be reasoning? can you not be reasoning? can they not be reasoning?
Perfect
can I not have reasoned? can you not have reasoned? can he not have reasoned? can we not have reasoned? can you not have reasoned? can they not have reasoned?
V-ing perfect
can I not have been reasoning? can you not have been reasoning? can he not have been reasoning? can we not have been reasoning? can you not have been reasoning? can they not have been reasoning?