I can structure you can structure she can structure we can structure you can structure they can structure
V-ing form
I can be structuring you can be structuring she can be structuring we can be structuring you can be structuring they can be structuring
Perfect
I can have structured you can have structured she can have structured we can have structured you can have structured they can have structured
V-ing perfect
I can have been structuring you can have been structuring she can have been structuring we can have been structuring you can have been structuring they can have been structuring
Negation
Simple form
I cannot structure you cannot structure she cannot structure we cannot structure you cannot structure they cannot structure
V-ing form
I cannot be structuring you cannot be structuring she cannot be structuring we cannot be structuring you cannot be structuring they cannot be structuring
Perfect
I cannot have structured you cannot have structured she cannot have structured we cannot have structured you cannot have structured they cannot have structured
V-ing perfect
I cannot have been structuring you cannot have been structuring she cannot have been structuring we cannot have been structuring you cannot have been structuring they cannot have been structuring
Interrogative form
Simple form
can I structure? can you structure? can she structure? can we structure? can you structure? can they structure?
V-ing form
can I be structuring? can you be structuring? can she be structuring? can we be structuring? can you be structuring? can they be structuring?
Perfect
can I have structured? can you have structured? can she have structured? can we have structured? can you have structured? can they have structured?
V-ing perfect
can I have been structuring? can you have been structuring? can she have been structuring? can we have been structuring? can you have been structuring? can they have been structuring?
Interro-negative form
Simple form
can I not structure? can you not structure? can she not structure? can we not structure? can you not structure? can they not structure?
V-ing form
can I not be structuring? can you not be structuring? can she not be structuring? can we not be structuring? can you not be structuring? can they not be structuring?
Perfect
can I not have structured? can you not have structured? can she not have structured? can we not have structured? can you not have structured? can they not have structured?
V-ing perfect
can I not have been structuring? can you not have been structuring? can she not have been structuring? can we not have been structuring? can you not have been structuring? can they not have been structuring?