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