I could structuralise you could structuralise he could structuralise we could structuralise you could structuralise they could structuralise
V-ing form
I could be structuralising you could be structuralising he could be structuralising we could be structuralising you could be structuralising they could be structuralising
Perfect
I could have structuralised you could have structuralised he could have structuralised we could have structuralised you could have structuralised they could have structuralised
V-ing perfect
I could have been structuralising you could have been structuralising he could have been structuralising we could have been structuralising you could have been structuralising they could have been structuralising
Negation
Simple form
I couldn't structuralise you couldn't structuralise he couldn't structuralise we couldn't structuralise you couldn't structuralise they couldn't structuralise
V-ing form
I couldn't be structuralising you couldn't be structuralising he couldn't be structuralising we couldn't be structuralising you couldn't be structuralising they couldn't be structuralising
Perfect
I couldn't have structuralised you couldn't have structuralised he couldn't have structuralised we couldn't have structuralised you couldn't have structuralised they couldn't have structuralised
V-ing perfect
I couldn't have been structuralising you couldn't have been structuralising he couldn't have been structuralising we couldn't have been structuralising you couldn't have been structuralising they couldn't have been structuralising
Interrogative form
Simple form
could I structuralise? could you structuralise? could he structuralise? could we structuralise? could you structuralise? could they structuralise?
V-ing form
could I be structuralising? could you be structuralising? could he be structuralising? could we be structuralising? could you be structuralising? could they be structuralising?
Perfect
could I have structuralised? could you have structuralised? could he have structuralised? could we have structuralised? could you have structuralised? could they have structuralised?
V-ing perfect
could I have been structuralising? could you have been structuralising? could he have been structuralising? could we have been structuralising? could you have been structuralising? could they have been structuralising?
Interro-negative form
Simple form
couldn't I structuralise? couldn't you structuralise? couldn't he structuralise? couldn't we structuralise? couldn't you structuralise? couldn't they structuralise?
V-ing form
couldn't I be structuralising? couldn't you be structuralising? couldn't he be structuralising? couldn't we be structuralising? couldn't you be structuralising? couldn't they be structuralising?
Perfect
couldn't I have structuralised? couldn't you have structuralised? couldn't he have structuralised? couldn't we have structuralised? couldn't you have structuralised? couldn't they have structuralised?
V-ing perfect
couldn't I have been structuralising? couldn't you have been structuralising? couldn't he have been structuralising? couldn't we have been structuralising? couldn't you have been structuralising? couldn't they have been structuralising?