English verb conjugation
CAN CENTRE

Regular verb: centre - centred - centred

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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