SIMPLE PRESENT
Affirmative
- I contribute
- you contribute
- she/he/it contributes
- we contribute
- you contribute
- they contribute
Negative
- I do not contribute
- you do not contribute
- she/he/it does not contribute
- we do not contribute
- you do not contribute
- they do not contribute
Interrogative
- do I contribute ?
- do you contribute ?
- does she/he/it contribute ?
- do we contribute ?
- do you contribute ?
- do they contribute ?
Negative - Interrogative
- do I not contribute ?
- do you not contribute ?
- does she/he/it not contribute ?
- do we not contribute ?
- do you not contribute ?
- do they not contribute ?
PRESENT CONTINUOUS
Affirmative
- I am contributing
- you are contributing
- she/he/it is contributing
- we are contributing
- you are contributing
- they are contributing
Negative
- I am not contributing
- you are not contributing
- she/he/it is not contributing
- we are not contributing
- you are not contributing
- they are not contributing
Interrogative
- am I contributing ?
- are you contributing ?
- is she/he/it contributing ?
- are we contributing ?
- are you contributing ?
- are they contributing ?
Negative - Interrogative
- am I not contributing ?
- are you not contributing ?
- is she/he/it not contributing ?
- are we not contributing ?
- are you not contributing ?
- are they not contributing ?
SIMPLE PAST
Affirmative
- I contributed
- you contributed
- she/he/it contributed
- we contributed
- you contributed
- they contributed
Negative
- I did not contribute
- you did not contribute
- she/he/it did not contribute
- we did not contribute
- you did not contribute
- they did not contribute
Interrogative
- did I contribute ?
- did you contribute ?
- did she/he/it contribute ?
- did we contribute ?
- did you contribute ?
- did they contribute ?
Negative - Interrogative
- did I not contribute ?
- did you not contribute ?
- did she/he/it not contribute ?
- did we not contribute ?
- did you not contribute ?
- did they not contribute ?
PRESENT PERFECT
Affirmative
- I have contributed
- you have contributed
- she/he/it has contributed
- we have contributed
- you have contributed
- they have contributed
Negative
- I have not contributed
- you have not contributed
- she/he/it has not contributed
- we have not contributed
- you have not contributed
- they have not contributed
Interrogative
- have I contributed ?
- have you contributed ?
- has she/he/it contributed ?
- have we contributed ?
- have you contributed ?
- have they contributed ?
Negative - Interrogative
- have I not contributed ?
- have you not contributed ?
- has she/he/it not contributed ?
- have we not contributed ?
- have you not contributed ?
- have they not contributed ?
PAST CONTINUOUS
Affirmative
- I was contributing
- you were contributing
- she/he/it was contributing
- we were contributing
- you were contributing
- they were contributing
Negative
- I was not contributing
- you were not contributing
- she/he/it was not contributing
- you were not contributing
- you were not contributing
- they were not contributing
Interrogative
- was I contributing ?
- were you contributing ?
- was she/he/it contributing ?
- were we contributing ?
- were you contributing ?
- were they contributing ?
Negative - Interrogative
- was I not contributing ?
- were you not contributing ?
- was she/he/it not contributing ?
- were we not contributing ?
- were you not contributing ?
- were they not contributing ?
PRESENT PERFECT CONTINUOUS
Affirmative
- I have been contributing
- you have been contributing
- she/he/it has been contributing
- we have been contributing
- you have been contributing
- they have been contributing
Negative
- I have not been contributing
- you have not been contributing
- she/he/it has not been contributing
- we have not been contributing
- you have not been contributing
- they have not been contributing
Interrogative
- have I been contributing ?
- have you been contributing ?
- has she/he/it been contributing ?
- have we been contributing ?
- have you been contributing ?
- have they been contributing ?
Negative - Interrogative
- have I not been contributing ?
- have you not been contributing ?
- has she/he/it not been contributing ?
- have we not been contributing ?
- have you not been contributing ?
- have they not been contributing ?
PAST PERFECT
Affirmative
- I had contributed
- you had contributed
- she/he/it had contributed
- we had contributed
- you had contributed
- they had contributed
Negative
- I had not contributed
- you had not contributed
- she/he/it had not contributed
- we had not contributed
- you had not contributed
- they had not contributed
Interrogative
- had I contributed ?
- had you contributed ?
- had she/he/it contributed ?
- had we contributed ?
- had you contributed ?
- had they contributed ?
Negative - Interrogative
- had I not contributed ?
- had you not contributed ?
- had she/he/it not contributed ?
- had we not contributed ?
- had you not contributed ?
- had they not contributed ?
PAST PERFECT CONTINUOUS
Affirmative
- I had been contributing
- you had been contributing
- she/he/it had been contributing
- we had been contributing
- you had been contributing
- they had been contributing
Negative
- I had not been contributing
- you had not been contributing
- she/he/it had not been contributing
- we had not been contributing
- you had not been contributing
- they had not been contributing
Interrogative
- had I been contributing ?
- had you been contributing ?
- had she/he/it been contributing ?
- had we been contributing ?
- had you been contributing ?
- had they been contributing ?
Negative - Interrogative
- had I not been contributing ?
- had you not been contributing ?
- had she/he/it not been contributing ?
- had we not been contributing ?
- had you not been contributing ?
- had they not been contributing ?