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