may labour
Regular verb: labour - laboured- laboured

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

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

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

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