SIMPLE PRESENT
Affirmative
- I prevent
- you prevent
- she/he/it prevents
- we prevent
- you prevent
- they prevent
Negative
- I do not prevent
- you do not prevent
- she/he/it does not prevent
- we do not prevent
- you do not prevent
- they do not prevent
Interrogative
- do I prevent ?
- do you prevent ?
- does she/he/it prevent ?
- do we prevent ?
- do you prevent ?
- do they prevent ?
Negative - Interrogative
- do I not prevent ?
- do you not prevent ?
- does she/he/it not prevent ?
- do we not prevent ?
- do you not prevent ?
- do they not prevent ?
PRESENT CONTINUOUS
Affirmative
- I am preventing
- you are preventing
- she/he/it is preventing
- we are preventing
- you are preventing
- they are preventing
Negative
- I am not preventing
- you are not preventing
- she/he/it is not preventing
- we are not preventing
- you are not preventing
- they are not preventing
Interrogative
- am I preventing ?
- are you preventing ?
- is she/he/it preventing ?
- are we preventing ?
- are you preventing ?
- are they preventing ?
Negative - Interrogative
- am I not preventing ?
- are you not preventing ?
- is she/he/it not preventing ?
- are we not preventing ?
- are you not preventing ?
- are they not preventing ?
SIMPLE PAST
Affirmative
- I prevented
- you prevented
- she/he/it prevented
- we prevented
- you prevented
- they prevented
Negative
- I did not prevent
- you did not prevent
- she/he/it did not prevent
- we did not prevent
- you did not prevent
- they did not prevent
Interrogative
- did I prevent ?
- did you prevent ?
- did she/he/it prevent ?
- did we prevent ?
- did you prevent ?
- did they prevent ?
Negative - Interrogative
- did I not prevent ?
- did you not prevent ?
- did she/he/it not prevent ?
- did we not prevent ?
- did you not prevent ?
- did they not prevent ?
PRESENT PERFECT
Affirmative
- I have prevented
- you have prevented
- she/he/it has prevented
- we have prevented
- you have prevented
- they have prevented
Negative
- I have not prevented
- you have not prevented
- she/he/it has not prevented
- we have not prevented
- you have not prevented
- they have not prevented
Interrogative
- have I prevented ?
- have you prevented ?
- has she/he/it prevented ?
- have we prevented ?
- have you prevented ?
- have they prevented ?
Negative - Interrogative
- have I not prevented ?
- have you not prevented ?
- has she/he/it not prevented ?
- have we not prevented ?
- have you not prevented ?
- have they not prevented ?
PAST CONTINUOUS
Affirmative
- I was preventing
- you were preventing
- she/he/it was preventing
- we were preventing
- you were preventing
- they were preventing
Negative
- I was not preventing
- you were not preventing
- she/he/it was not preventing
- you were not preventing
- you were not preventing
- they were not preventing
Interrogative
- was I preventing ?
- were you preventing ?
- was she/he/it preventing ?
- were we preventing ?
- were you preventing ?
- were they preventing ?
Negative - Interrogative
- was I not preventing ?
- were you not preventing ?
- was she/he/it not preventing ?
- were we not preventing ?
- were you not preventing ?
- were they not preventing ?
PRESENT PERFECT CONTINUOUS
Affirmative
- I have been preventing
- you have been preventing
- she/he/it has been preventing
- we have been preventing
- you have been preventing
- they have been preventing
Negative
- I have not been preventing
- you have not been preventing
- she/he/it has not been preventing
- we have not been preventing
- you have not been preventing
- they have not been preventing
Interrogative
- have I been preventing ?
- have you been preventing ?
- has she/he/it been preventing ?
- have we been preventing ?
- have you been preventing ?
- have they been preventing ?
Negative - Interrogative
- have I not been preventing ?
- have you not been preventing ?
- has she/he/it not been preventing ?
- have we not been preventing ?
- have you not been preventing ?
- have they not been preventing ?
PAST PERFECT
Affirmative
- I had prevented
- you had prevented
- she/he/it had prevented
- we had prevented
- you had prevented
- they had prevented
Negative
- I had not prevented
- you had not prevented
- she/he/it had not prevented
- we had not prevented
- you had not prevented
- they had not prevented
Interrogative
- had I prevented ?
- had you prevented ?
- had she/he/it prevented ?
- had we prevented ?
- had you prevented ?
- had they prevented ?
Negative - Interrogative
- had I not prevented ?
- had you not prevented ?
- had she/he/it not prevented ?
- had we not prevented ?
- had you not prevented ?
- had they not prevented ?
PAST PERFECT CONTINUOUS
Affirmative
- I had been preventing
- you had been preventing
- she/he/it had been preventing
- we had been preventing
- you had been preventing
- they had been preventing
Negative
- I had not been preventing
- you had not been preventing
- she/he/it had not been preventing
- we had not been preventing
- you had not been preventing
- they had not been preventing
Interrogative
- had I been preventing ?
- had you been preventing ?
- had she/he/it been preventing ?
- had we been preventing ?
- had you been preventing ?
- had they been preventing ?
Negative - Interrogative
- had I not been preventing ?
- had you not been preventing ?
- had she/he/it not been preventing ?
- had we not been preventing ?
- had you not been preventing ?
- had they not been preventing ?