could labour
Verbo regular: labour - laboured- laboured

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could labour
you could labour
he could labour
we could labour
you could labour
they could labour 	I could be labouring
you could be labouring
he could be labouring
we could be labouring
you could be labouring
they could be labouring	I could have laboured
you could have laboured
he could have laboured
we could have laboured
you could have laboured
they could have laboured	I could have been labouring
you could have been labouring
he could have been labouring
we could have been labouring
you could have been labouring
they could have been labouring	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't labour
you couldn't labour
he couldn't labour
we couldn't labour
you couldn't labour
they couldn't labour 	I couldn't be labouring
you couldn't be labouring
he couldn't be labouring
we couldn't be labouring
you couldn't be labouring
they couldn't be labouring	I couldn't have laboured
you couldn't have laboured
he couldn't have laboured
we couldn't have laboured
you couldn't have laboured
they couldn't have laboured	I couldn't have been labouring
you couldn't have been labouring
he couldn't have been labouring
we couldn't have been labouring
you couldn't have been labouring
they couldn't have been labouring	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I labour?
could you labour?
could he labour?
could we labour?
could you labour?
could they labour? 	could I be labouring?
could you be labouring?
could he be labouring?
could we be labouring?
could you be labouring?
could they be labouring? 	could I have laboured?
could you have laboured?
could he have laboured?
could we have laboured?
could you have laboured?
could they have laboured? 	could I have been labouring?
could you have been labouring?
could he have been labouring?
could we have been labouring?
could you have been labouring?
could they have been labouring? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I labour?
couldn't you labour?
couldn't he labour?
couldn't we labour?
couldn't you labour?
couldn't they labour? 	couldn't I be labouring?
couldn't you be labouring?
couldn't he be labouring?
couldn't we be labouring?
couldn't you be labouring?
couldn't they be labouring? 	couldn't I have laboured?
couldn't you have laboured?
couldn't he have laboured?
couldn't we have laboured?
couldn't you have laboured?
couldn't they have laboured? 	couldn't I have been labouring?
couldn't you have been labouring?
couldn't he have been labouring?
couldn't we have been labouring?
couldn't you have been labouring?
couldn't they have been labouring?