English verb conjugation
CAN LABOUR

Regular verb: labour - laboured - laboured

Affirmation

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