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