SIMPLE PRESENT
Affirmative
- I occur
- you occur
- she/he/it occurs
- we occur
- you occur
- they occur
Negative
- I do not occur
- you do not occur
- she/he/it does not occur
- we do not occur
- you do not occur
- they do not occur
Interrogative
- do I occur ?
- do you occur ?
- does she/he/it occur ?
- do we occur ?
- do you occur ?
- do they occur ?
Negative - Interrogative
- do I not occur ?
- do you not occur ?
- does she/he/it not occur ?
- do we not occur ?
- do you not occur ?
- do they not occur ?
PRESENT CONTINUOUS
Affirmative
- I am occurring
- you are occurring
- she/he/it is occurring
- we are occurring
- you are occurring
- they are occurring
Negative
- I am not occurring
- you are not occurring
- she/he/it is not occurring
- we are not occurring
- you are not occurring
- they are not occurring
Interrogative
- am I occurring ?
- are you occurring ?
- is she/he/it occurring ?
- are we occurring ?
- are you occurring ?
- are they occurring ?
Negative - Interrogative
- am I not occurring ?
- are you not occurring ?
- is she/he/it not occurring ?
- are we not occurring ?
- are you not occurring ?
- are they not occurring ?
SIMPLE PAST
Affirmative
- I occurred
- you occurred
- she/he/it occurred
- we occurred
- you occurred
- they occurred
Negative
- I did not occur
- you did not occur
- she/he/it did not occur
- we did not occur
- you did not occur
- they did not occur
Interrogative
- did I occur ?
- did you occur ?
- did she/he/it occur ?
- did we occur ?
- did you occur ?
- did they occur ?
Negative - Interrogative
- did I not occur ?
- did you not occur ?
- did she/he/it not occur ?
- did we not occur ?
- did you not occur ?
- did they not occur ?
PRESENT PERFECT
Affirmative
- I have occurred
- you have occurred
- she/he/it has occurred
- we have occurred
- you have occurred
- they have occurred
Negative
- I have not occurred
- you have not occurred
- she/he/it has not occurred
- we have not occurred
- you have not occurred
- they have not occurred
Interrogative
- have I occurred ?
- have you occurred ?
- has she/he/it occurred ?
- have we occurred ?
- have you occurred ?
- have they occurred ?
Negative - Interrogative
- have I not occurred ?
- have you not occurred ?
- has she/he/it not occurred ?
- have we not occurred ?
- have you not occurred ?
- have they not occurred ?
PAST CONTINUOUS
Affirmative
- I was occurring
- you were occurring
- she/he/it was occurring
- we were occurring
- you were occurring
- they were occurring
Negative
- I was not occurring
- you were not occurring
- she/he/it was not occurring
- you were not occurring
- you were not occurring
- they were not occurring
Interrogative
- was I occurring ?
- were you occurring ?
- was she/he/it occurring ?
- were we occurring ?
- were you occurring ?
- were they occurring ?
Negative - Interrogative
- was I not occurring ?
- were you not occurring ?
- was she/he/it not occurring ?
- were we not occurring ?
- were you not occurring ?
- were they not occurring ?
PRESENT PERFECT CONTINUOUS
Affirmative
- I have been occurring
- you have been occurring
- she/he/it has been occurring
- we have been occurring
- you have been occurring
- they have been occurring
Negative
- I have not been occurring
- you have not been occurring
- she/he/it has not been occurring
- we have not been occurring
- you have not been occurring
- they have not been occurring
Interrogative
- have I been occurring ?
- have you been occurring ?
- has she/he/it been occurring ?
- have we been occurring ?
- have you been occurring ?
- have they been occurring ?
Negative - Interrogative
- have I not been occurring ?
- have you not been occurring ?
- has she/he/it not been occurring ?
- have we not been occurring ?
- have you not been occurring ?
- have they not been occurring ?
PAST PERFECT
Affirmative
- I had occurred
- you had occurred
- she/he/it had occurred
- we had occurred
- you had occurred
- they had occurred
Negative
- I had not occurred
- you had not occurred
- she/he/it had not occurred
- we had not occurred
- you had not occurred
- they had not occurred
Interrogative
- had I occurred ?
- had you occurred ?
- had she/he/it occurred ?
- had we occurred ?
- had you occurred ?
- had they occurred ?
Negative - Interrogative
- had I not occurred ?
- had you not occurred ?
- had she/he/it not occurred ?
- had we not occurred ?
- had you not occurred ?
- had they not occurred ?
PAST PERFECT CONTINUOUS
Affirmative
- I had been occurring
- you had been occurring
- she/he/it had been occurring
- we had been occurring
- you had been occurring
- they had been occurring
Negative
- I had not been occurring
- you had not been occurring
- she/he/it had not been occurring
- we had not been occurring
- you had not been occurring
- they had not been occurring
Interrogative
- had I been occurring ?
- had you been occurring ?
- had she/he/it been occurring ?
- had we been occurring ?
- had you been occurring ?
- had they been occurring ?
Negative - Interrogative
- had I not been occurring ?
- had you not been occurring ?
- had she/he/it not been occurring ?
- had we not been occurring ?
- had you not been occurring ?
- had they not been occurring ?