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