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