English verb conjugation
MUST CENTRE

Regular verb: centre - centred - centred

Affirmation

Simple form	V-ing form
I must centre you must centre he must centre we must centre you must centre they must centre	I must be centring you must be centring he must be centring we must be centring you must be centring they must be centring
Perfect	V-ing perfect
I must have centred you must have centred he must have centred we must have centred you must have centred they must have centred	I must have been centring you must have been centring he must have been centring we must have been centring you must have been centring they must have been centring

Negation

Simple form	V-ing form
I must not centre you must not centre he must not centre we must not centre you must not centre they must not centre	I must not be centring you must not be centring he must not be centring we must not be centring you must not be centring they must not be centring
Perfect	V-ing perfect
I must not have centred you must not have centred he must not have centred we must not have centred you must not have centred they must not have centred	I must not have been centring you must not have been centring he must not have been centring we must not have been centring you must not have been centring they must not have been centring

Interrogative form

Simple form	V-ing form
must I centre? must you centre? must he centre? must we centre? must you centre? must they centre?	must I be centring? must you be centring? must he be centring? must we be centring? must you be centring? must they be centring?
Perfect	V-ing perfect
must I have centred? must you have centred? must he have centred? must we have centred? must you have centred? must they have centred?	must I have been centring? must you have been centring? must he have been centring? must we have been centring? must you have been centring? must they have been centring?

Interro-negative form

Simple form	V-ing form
must I not centre? must you not centre? must he not centre? must we not centre? must you not centre? must they not centre?	must I not be centring? must you not be centring? must he not be centring? must we not be centring? must you not be centring? must they not be centring?
Perfect	V-ing perfect
must I not have centred? must you not have centred? must he not have centred? must we not have centred? must you not have centred? must they not have centred?	must I not have been centring? must you not have been centring? must he not have been centring? must we not have been centring? must you not have been centring? must they not have been centring?