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