English verb conjugation
COULD PRACTISE

Regular verb: practise - practised - practised

Affirmation

Simple form	V-ing form
I could practise you could practise he could practise we could practise you could practise they could practise	I could be practising you could be practising he could be practising we could be practising you could be practising they could be practising
Perfect	V-ing perfect
I could have practised you could have practised he could have practised we could have practised you could have practised they could have practised	I could have been practising you could have been practising he could have been practising we could have been practising you could have been practising they could have been practising

Negation

Simple form	V-ing form
I could not practise you could not practise he could not practise we could not practise you could not practise they could not practise	I could not be practising you could not be practising he could not be practising we could not be practising you could not be practising they could not be practising
Perfect	V-ing perfect
I could not have practised you could not have practised he could not have practised we could not have practised you could not have practised they could not have practised	I could not have been practising you could not have been practising he could not have been practising we could not have been practising you could not have been practising they could not have been practising

Interrogative form

Simple form	V-ing form
could I practise? could you practise? could he practise? could we practise? could you practise? could they practise?	could I be practising? could you be practising? could he be practising? could we be practising? could you be practising? could they be practising?
Perfect	V-ing perfect
could I have practised? could you have practised? could he have practised? could we have practised? could you have practised? could they have practised?	could I have been practising? could you have been practising? could he have been practising? could we have been practising? could you have been practising? could they have been practising?

Interro-negative form

Simple form	V-ing form
could I not practise? could you not practise? could he not practise? could we not practise? could you not practise? could they not practise?	could I not be practising? could you not be practising? could he not be practising? could we not be practising? could you not be practising? could they not be practising?
Perfect	V-ing perfect
could I not have practised? could you not have practised? could he not have practised? could we not have practised? could you not have practised? could they not have practised?	could I not have been practising? could you not have been practising? could he not have been practising? could we not have been practising? could you not have been practising? could they not have been practising?