I could decimalise you could decimalise she could decimalise we could decimalise you could decimalise they could decimalise
V-ing form
I could be decimalising you could be decimalising she could be decimalising we could be decimalising you could be decimalising they could be decimalising
Perfect
I could have decimalised you could have decimalised she could have decimalised we could have decimalised you could have decimalised they could have decimalised
V-ing perfect
I could have been decimalising you could have been decimalising she could have been decimalising we could have been decimalising you could have been decimalising they could have been decimalising
Negation
Simple form
I couldn't decimalise you couldn't decimalise she couldn't decimalise we couldn't decimalise you couldn't decimalise they couldn't decimalise
V-ing form
I couldn't be decimalising you couldn't be decimalising she couldn't be decimalising we couldn't be decimalising you couldn't be decimalising they couldn't be decimalising
Perfect
I couldn't have decimalised you couldn't have decimalised she couldn't have decimalised we couldn't have decimalised you couldn't have decimalised they couldn't have decimalised
V-ing perfect
I couldn't have been decimalising you couldn't have been decimalising she couldn't have been decimalising we couldn't have been decimalising you couldn't have been decimalising they couldn't have been decimalising
Interrogative form
Simple form
could I decimalise? could you decimalise? could she decimalise? could we decimalise? could you decimalise? could they decimalise?
V-ing form
could I be decimalising? could you be decimalising? could she be decimalising? could we be decimalising? could you be decimalising? could they be decimalising?
Perfect
could I have decimalised? could you have decimalised? could she have decimalised? could we have decimalised? could you have decimalised? could they have decimalised?
V-ing perfect
could I have been decimalising? could you have been decimalising? could she have been decimalising? could we have been decimalising? could you have been decimalising? could they have been decimalising?
Interro-negative form
Simple form
couldn't I decimalise? couldn't you decimalise? couldn't she decimalise? couldn't we decimalise? couldn't you decimalise? couldn't they decimalise?
V-ing form
couldn't I be decimalising? couldn't you be decimalising? couldn't she be decimalising? couldn't we be decimalising? couldn't you be decimalising? couldn't they be decimalising?
Perfect
couldn't I have decimalised? couldn't you have decimalised? couldn't she have decimalised? couldn't we have decimalised? couldn't you have decimalised? couldn't they have decimalised?
V-ing perfect
couldn't I have been decimalising? couldn't you have been decimalising? couldn't she have been decimalising? couldn't we have been decimalising? couldn't you have been decimalising? couldn't they have been decimalising?