I can structure you can structure he can structure we can structure you can structure they can structure
V-ing form
I can be structuring you can be structuring he can be structuring we can be structuring you can be structuring they can be structuring
Perfect
I can have structured you can have structured he 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 he can have been structuring we can have been structuring you can have been structuring they can have been structuring
Negation
Simple form
I can't structure you can't structure he can't structure we can't structure you can't structure they can't structure
V-ing form
I can't be structuring you can't be structuring he can't be structuring we can't be structuring you can't be structuring they can't be structuring
Perfect
I can't have structured you can't have structured he can't have structured we can't have structured you can't have structured they can't have structured
V-ing perfect
I can't have been structuring you can't have been structuring he can't have been structuring we can't have been structuring you can't have been structuring they can't have been structuring
Interrogative form
Simple form
can I structure? can you structure? can he structure? can we structure? can you structure? can they structure?
V-ing form
can I be structuring? can you be structuring? can he be structuring? can we be structuring? can you be structuring? can they be structuring?
Perfect
can I have structured? can you have structured? can he 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 he have been structuring? can we have been structuring? can you have been structuring? can they have been structuring?
Interro-negative form
Simple form
can't I structure? can't you structure? can't he structure? can't we structure? can't you structure? can't they structure?
V-ing form
can't I be structuring? can't you be structuring? can't he be structuring? can't we be structuring? can't you be structuring? can't they be structuring?
Perfect
can't I have structured? can't you have structured? can't he have structured? can't we have structured? can't you have structured? can't they have structured?
V-ing perfect
can't I have been structuring? can't you have been structuring? can't he have been structuring? can't we have been structuring? can't you have been structuring? can't they have been structuring?