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