could practise
Verbo regular: practise - practised- practised

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could practise
you could practise
she could practise
we could practise
you could practise
they could practise 	I could be practising
you could be practising
she could be practising
we could be practising
you could be practising
they could be practising	I could have practised
you could have practised
she 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
she could have been practising
we could have been practising
you could have been practising
they could have been practising	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't practise
you couldn't practise
she couldn't practise
we couldn't practise
you couldn't practise
they couldn't practise 	I couldn't be practising
you couldn't be practising
she couldn't be practising
we couldn't be practising
you couldn't be practising
they couldn't be practising	I couldn't have practised
you couldn't have practised
she couldn't have practised
we couldn't have practised
you couldn't have practised
they couldn't have practised	I couldn't have been practising
you couldn't have been practising
she couldn't have been practising
we couldn't have been practising
you couldn't have been practising
they couldn't have been practising	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I practise?
could you practise?
could she practise?
could we practise?
could you practise?
could they practise? 	could I be practising?
could you be practising?
could she be practising?
could we be practising?
could you be practising?
could they be practising? 	could I have practised?
could you have practised?
could she 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 she have been practising?
could we have been practising?
could you have been practising?
could they have been practising? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I practise?
couldn't you practise?
couldn't she practise?
couldn't we practise?
couldn't you practise?
couldn't they practise? 	couldn't I be practising?
couldn't you be practising?
couldn't she be practising?
couldn't we be practising?
couldn't you be practising?
couldn't they be practising? 	couldn't I have practised?
couldn't you have practised?
couldn't she have practised?
couldn't we have practised?
couldn't you have practised?
couldn't they have practised? 	couldn't I have been practising?
couldn't you have been practising?
couldn't she have been practising?
couldn't we have been practising?
couldn't you have been practising?
couldn't they have been practising?