can labour
Regular verb: labour - laboured- laboured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can labour
you can labour
she can labour
we can labour
you can labour
they can labour 	I can be labouring
you can be labouring
she can be labouring
we can be labouring
you can be labouring
they can be labouring	I can have laboured
you can have laboured
she can have laboured
we can have laboured
you can have laboured
they can have laboured	I can have been labouring
you can have been labouring
she can have been labouring
we can have been labouring
you can have been labouring
they can have been labouring	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot labour
you cannot labour
she cannot labour
we cannot labour
you cannot labour
they cannot labour 	I cannot be labouring
you cannot be labouring
she cannot be labouring
we cannot be labouring
you cannot be labouring
they cannot be labouring	I cannot have laboured
you cannot have laboured
she cannot have laboured
we cannot have laboured
you cannot have laboured
they cannot have laboured	I cannot have been labouring
you cannot have been labouring
she cannot have been labouring
we cannot have been labouring
you cannot have been labouring
they cannot have been labouring	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I labour?
can you labour?
can she labour?
can we labour?
can you labour?
can they labour? 	can I be labouring?
can you be labouring?
can she be labouring?
can we be labouring?
can you be labouring?
can they be labouring? 	can I have laboured?
can you have laboured?
can she have laboured?
can we have laboured?
can you have laboured?
can they have laboured? 	can I have been labouring?
can you have been labouring?
can she have been labouring?
can we have been labouring?
can you have been labouring?
can they have been labouring? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not labour?
can you not labour?
can she not labour?
can we not labour?
can you not labour?
can they not labour? 	can I not be labouring?
can you not be labouring?
can she not be labouring?
can we not be labouring?
can you not be labouring?
can they not be labouring? 	can I not have laboured?
can you not have laboured?
can she not have laboured?
can we not have laboured?
can you not have laboured?
can they not have laboured? 	can I not have been labouring?
can you not have been labouring?
can she not have been labouring?
can we not have been labouring?
can you not have been labouring?
can they not have been labouring?