SIMPLE PRESENT
Affirmative
- I centre
- you centre
- she/he/it centres
- we centre
- you centre
- they centre
Negative
- I do not centre
- you do not centre
- she/he/it does not centre
- we do not centre
- you do not centre
- they do not centre
Interrogative
- do I centre ?
- do you centre ?
- does she/he/it centre ?
- do we centre ?
- do you centre ?
- do they centre ?
Negative - Interrogative
- do I not centre ?
- do you not centre ?
- does she/he/it not centre ?
- do we not centre ?
- do you not centre ?
- do they not centre ?
PRESENT CONTINUOUS
Affirmative
- I am centring
- you are centring
- she/he/it is centring
- we are centring
- you are centring
- they are centring
Negative
- I am not centring
- you are not centring
- she/he/it is not centring
- we are not centring
- you are not centring
- they are not centring
Interrogative
- am I centring ?
- are you centring ?
- is she/he/it centring ?
- are we centring ?
- are you centring ?
- are they centring ?
Negative - Interrogative
- am I not centring ?
- are you not centring ?
- is she/he/it not centring ?
- are we not centring ?
- are you not centring ?
- are they not centring ?
SIMPLE PAST
Affirmative
- I centred
- you centred
- she/he/it centred
- we centred
- you centred
- they centred
Negative
- I did not centre
- you did not centre
- she/he/it did not centre
- we did not centre
- you did not centre
- they did not centre
Interrogative
- did I centre ?
- did you centre ?
- did she/he/it centre ?
- did we centre ?
- did you centre ?
- did they centre ?
Negative - Interrogative
- did I not centre ?
- did you not centre ?
- did she/he/it not centre ?
- did we not centre ?
- did you not centre ?
- did they not centre ?
PRESENT PERFECT
Affirmative
- I have centred
- you have centred
- she/he/it has centred
- we have centred
- you have centred
- they have centred
Negative
- I have not centred
- you have not centred
- she/he/it has not centred
- we have not centred
- you have not centred
- they have not centred
Interrogative
- have I centred ?
- have you centred ?
- has she/he/it centred ?
- have we centred ?
- have you centred ?
- have they centred ?
Negative - Interrogative
- have I not centred ?
- have you not centred ?
- has she/he/it not centred ?
- have we not centred ?
- have you not centred ?
- have they not centred ?
PAST CONTINUOUS
Affirmative
- I was centring
- you were centring
- she/he/it was centring
- we were centring
- you were centring
- they were centring
Negative
- I was not centring
- you were not centring
- she/he/it was not centring
- you were not centring
- you were not centring
- they were not centring
Interrogative
- was I centring ?
- were you centring ?
- was she/he/it centring ?
- were we centring ?
- were you centring ?
- were they centring ?
Negative - Interrogative
- was I not centring ?
- were you not centring ?
- was she/he/it not centring ?
- were we not centring ?
- were you not centring ?
- were they not centring ?
PRESENT PERFECT CONTINUOUS
Affirmative
- I have been centring
- you have been centring
- she/he/it has been centring
- we have been centring
- you have been centring
- they have been centring
Negative
- I have not been centring
- you have not been centring
- she/he/it has not been centring
- we have not been centring
- you have not been centring
- they have not been centring
Interrogative
- have I been centring ?
- have you been centring ?
- has she/he/it been centring ?
- have we been centring ?
- have you been centring ?
- have they been centring ?
Negative - Interrogative
- have I not been centring ?
- have you not been centring ?
- has she/he/it not been centring ?
- have we not been centring ?
- have you not been centring ?
- have they not been centring ?
PAST PERFECT
Affirmative
- I had centred
- you had centred
- she/he/it had centred
- we had centred
- you had centred
- they had centred
Negative
- I had not centred
- you had not centred
- she/he/it had not centred
- we had not centred
- you had not centred
- they had not centred
Interrogative
- had I centred ?
- had you centred ?
- had she/he/it centred ?
- had we centred ?
- had you centred ?
- had they centred ?
Negative - Interrogative
- had I not centred ?
- had you not centred ?
- had she/he/it not centred ?
- had we not centred ?
- had you not centred ?
- had they not centred ?
PAST PERFECT CONTINUOUS
Affirmative
- I had been centring
- you had been centring
- she/he/it had been centring
- we had been centring
- you had been centring
- they had been centring
Negative
- I had not been centring
- you had not been centring
- she/he/it had not been centring
- we had not been centring
- you had not been centring
- they had not been centring
Interrogative
- had I been centring ?
- had you been centring ?
- had she/he/it been centring ?
- had we been centring ?
- had you been centring ?
- had they been centring ?
Negative - Interrogative
- had I not been centring ?
- had you not been centring ?
- had she/he/it not been centring ?
- had we not been centring ?
- had you not been centring ?
- had they not been centring ?