SIMPLE PRESENT
Affirmative
- I center
- you center
- she/he/it centers
- we center
- you center
- they center
Negative
- I do not center
- you do not center
- she/he/it does not center
- we do not center
- you do not center
- they do not center
Interrogative
- do I center ?
- do you center ?
- does she/he/it center ?
- do we center ?
- do you center ?
- do they center ?
Negative - Interrogative
- do I not center ?
- do you not center ?
- does she/he/it not center ?
- do we not center ?
- do you not center ?
- do they not center ?
PRESENT CONTINUOUS
Affirmative
- I am centering
- you are centering
- she/he/it is centering
- we are centering
- you are centering
- they are centering
Negative
- I am not centering
- you are not centering
- she/he/it is not centering
- we are not centering
- you are not centering
- they are not centering
Interrogative
- am I centering ?
- are you centering ?
- is she/he/it centering ?
- are we centering ?
- are you centering ?
- are they centering ?
Negative - Interrogative
- am I not centering ?
- are you not centering ?
- is she/he/it not centering ?
- are we not centering ?
- are you not centering ?
- are they not centering ?
SIMPLE PAST
Affirmative
- I centered
- you centered
- she/he/it centered
- we centered
- you centered
- they centered
Negative
- I did not center
- you did not center
- she/he/it did not center
- we did not center
- you did not center
- they did not center
Interrogative
- did I center ?
- did you center ?
- did she/he/it center ?
- did we center ?
- did you center ?
- did they center ?
Negative - Interrogative
- did I not center ?
- did you not center ?
- did she/he/it not center ?
- did we not center ?
- did you not center ?
- did they not center ?
PRESENT PERFECT
Affirmative
- I have centered
- you have centered
- she/he/it has centered
- we have centered
- you have centered
- they have centered
Negative
- I have not centered
- you have not centered
- she/he/it has not centered
- we have not centered
- you have not centered
- they have not centered
Interrogative
- have I centered ?
- have you centered ?
- has she/he/it centered ?
- have we centered ?
- have you centered ?
- have they centered ?
Negative - Interrogative
- have I not centered ?
- have you not centered ?
- has she/he/it not centered ?
- have we not centered ?
- have you not centered ?
- have they not centered ?
PAST CONTINUOUS
Affirmative
- I was centering
- you were centering
- she/he/it was centering
- we were centering
- you were centering
- they were centering
Negative
- I was not centering
- you were not centering
- she/he/it was not centering
- you were not centering
- you were not centering
- they were not centering
Interrogative
- was I centering ?
- were you centering ?
- was she/he/it centering ?
- were we centering ?
- were you centering ?
- were they centering ?
Negative - Interrogative
- was I not centering ?
- were you not centering ?
- was she/he/it not centering ?
- were we not centering ?
- were you not centering ?
- were they not centering ?
PRESENT PERFECT CONTINUOUS
Affirmative
- I have been centering
- you have been centering
- she/he/it has been centering
- we have been centering
- you have been centering
- they have been centering
Negative
- I have not been centering
- you have not been centering
- she/he/it has not been centering
- we have not been centering
- you have not been centering
- they have not been centering
Interrogative
- have I been centering ?
- have you been centering ?
- has she/he/it been centering ?
- have we been centering ?
- have you been centering ?
- have they been centering ?
Negative - Interrogative
- have I not been centering ?
- have you not been centering ?
- has she/he/it not been centering ?
- have we not been centering ?
- have you not been centering ?
- have they not been centering ?
PAST PERFECT
Affirmative
- I had centered
- you had centered
- she/he/it had centered
- we had centered
- you had centered
- they had centered
Negative
- I had not centered
- you had not centered
- she/he/it had not centered
- we had not centered
- you had not centered
- they had not centered
Interrogative
- had I centered ?
- had you centered ?
- had she/he/it centered ?
- had we centered ?
- had you centered ?
- had they centered ?
Negative - Interrogative
- had I not centered ?
- had you not centered ?
- had she/he/it not centered ?
- had we not centered ?
- had you not centered ?
- had they not centered ?
PAST PERFECT CONTINUOUS
Affirmative
- I had been centering
- you had been centering
- she/he/it had been centering
- we had been centering
- you had been centering
- they had been centering
Negative
- I had not been centering
- you had not been centering
- she/he/it had not been centering
- we had not been centering
- you had not been centering
- they had not been centering
Interrogative
- had I been centering ?
- had you been centering ?
- had she/he/it been centering ?
- had we been centering ?
- had you been centering ?
- had they been centering ?
Negative - Interrogative
- had I not been centering ?
- had you not been centering ?
- had she/he/it not been centering ?
- had we not been centering ?
- had you not been centering ?
- had they not been centering ?