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