English verb conjugation
MUST HARBOUR

Regular verb: harbour - harboured - harboured

Affirmation

Simple form	V-ing form
I must harbour you must harbour he must harbour we must harbour you must harbour they must harbour	I must be harbouring you must be harbouring he must be harbouring we must be harbouring you must be harbouring they must be harbouring
Perfect	V-ing perfect
I must have harboured you must have harboured he must have harboured we must have harboured you must have harboured they must have harboured	I must have been harbouring you must have been harbouring he must have been harbouring we must have been harbouring you must have been harbouring they must have been harbouring

Negation

Simple form	V-ing form
I mustn't harbour you mustn't harbour he mustn't harbour we mustn't harbour you mustn't harbour they mustn't harbour	I mustn't be harbouring you mustn't be harbouring he mustn't be harbouring we mustn't be harbouring you mustn't be harbouring they mustn't be harbouring
Perfect	V-ing perfect
I mustn't have harboured you mustn't have harboured he mustn't have harboured we mustn't have harboured you mustn't have harboured they mustn't have harboured	I mustn't have been harbouring you mustn't have been harbouring he mustn't have been harbouring we mustn't have been harbouring you mustn't have been harbouring they mustn't have been harbouring

Interrogative form

Simple form	V-ing form
must I harbour? must you harbour? must he harbour? must we harbour? must you harbour? must they harbour?	must I be harbouring? must you be harbouring? must he be harbouring? must we be harbouring? must you be harbouring? must they be harbouring?
Perfect	V-ing perfect
must I have harboured? must you have harboured? must he have harboured? must we have harboured? must you have harboured? must they have harboured?	must I have been harbouring? must you have been harbouring? must he have been harbouring? must we have been harbouring? must you have been harbouring? must they have been harbouring?

Interro-negative form

Simple form	V-ing form
mustn't I harbour? mustn't you harbour? mustn't he harbour? mustn't we harbour? mustn't you harbour? mustn't they harbour?	mustn't I be harbouring? mustn't you be harbouring? mustn't he be harbouring? mustn't we be harbouring? mustn't you be harbouring? mustn't they be harbouring?
Perfect	V-ing perfect
mustn't I have harboured? mustn't you have harboured? mustn't he have harboured? mustn't we have harboured? mustn't you have harboured? mustn't they have harboured?	mustn't I have been harbouring? mustn't you have been harbouring? mustn't he have been harbouring? mustn't we have been harbouring? mustn't you have been harbouring? mustn't they have been harbouring?