SIMPLE PRESENT
Affirmative
- I strengthen
- you strengthen
- she/he/it strengthens
- we strengthen
- you strengthen
- they strengthen
Negative
- I do not strengthen
- you do not strengthen
- she/he/it does not strengthen
- we do not strengthen
- you do not strengthen
- they do not strengthen
Interrogative
- do I strengthen ?
- do you strengthen ?
- does she/he/it strengthen ?
- do we strengthen ?
- do you strengthen ?
- do they strengthen ?
Negative - Interrogative
- do I not strengthen ?
- do you not strengthen ?
- does she/he/it not strengthen ?
- do we not strengthen ?
- do you not strengthen ?
- do they not strengthen ?
PRESENT CONTINUOUS
Affirmative
- I am strengthening
- you are strengthening
- she/he/it is strengthening
- we are strengthening
- you are strengthening
- they are strengthening
Negative
- I am not strengthening
- you are not strengthening
- she/he/it is not strengthening
- we are not strengthening
- you are not strengthening
- they are not strengthening
Interrogative
- am I strengthening ?
- are you strengthening ?
- is she/he/it strengthening ?
- are we strengthening ?
- are you strengthening ?
- are they strengthening ?
Negative - Interrogative
- am I not strengthening ?
- are you not strengthening ?
- is she/he/it not strengthening ?
- are we not strengthening ?
- are you not strengthening ?
- are they not strengthening ?
SIMPLE PAST
Affirmative
- I strengthened
- you strengthened
- she/he/it strengthened
- we strengthened
- you strengthened
- they strengthened
Negative
- I did not strengthen
- you did not strengthen
- she/he/it did not strengthen
- we did not strengthen
- you did not strengthen
- they did not strengthen
Interrogative
- did I strengthen ?
- did you strengthen ?
- did she/he/it strengthen ?
- did we strengthen ?
- did you strengthen ?
- did they strengthen ?
Negative - Interrogative
- did I not strengthen ?
- did you not strengthen ?
- did she/he/it not strengthen ?
- did we not strengthen ?
- did you not strengthen ?
- did they not strengthen ?
PRESENT PERFECT
Affirmative
- I have strengthened
- you have strengthened
- she/he/it has strengthened
- we have strengthened
- you have strengthened
- they have strengthened
Negative
- I have not strengthened
- you have not strengthened
- she/he/it has not strengthened
- we have not strengthened
- you have not strengthened
- they have not strengthened
Interrogative
- have I strengthened ?
- have you strengthened ?
- has she/he/it strengthened ?
- have we strengthened ?
- have you strengthened ?
- have they strengthened ?
Negative - Interrogative
- have I not strengthened ?
- have you not strengthened ?
- has she/he/it not strengthened ?
- have we not strengthened ?
- have you not strengthened ?
- have they not strengthened ?
PAST CONTINUOUS
Affirmative
- I was strengthening
- you were strengthening
- she/he/it was strengthening
- we were strengthening
- you were strengthening
- they were strengthening
Negative
- I was not strengthening
- you were not strengthening
- she/he/it was not strengthening
- you were not strengthening
- you were not strengthening
- they were not strengthening
Interrogative
- was I strengthening ?
- were you strengthening ?
- was she/he/it strengthening ?
- were we strengthening ?
- were you strengthening ?
- were they strengthening ?
Negative - Interrogative
- was I not strengthening ?
- were you not strengthening ?
- was she/he/it not strengthening ?
- were we not strengthening ?
- were you not strengthening ?
- were they not strengthening ?
PRESENT PERFECT CONTINUOUS
Affirmative
- I have been strengthening
- you have been strengthening
- she/he/it has been strengthening
- we have been strengthening
- you have been strengthening
- they have been strengthening
Negative
- I have not been strengthening
- you have not been strengthening
- she/he/it has not been strengthening
- we have not been strengthening
- you have not been strengthening
- they have not been strengthening
Interrogative
- have I been strengthening ?
- have you been strengthening ?
- has she/he/it been strengthening ?
- have we been strengthening ?
- have you been strengthening ?
- have they been strengthening ?
Negative - Interrogative
- have I not been strengthening ?
- have you not been strengthening ?
- has she/he/it not been strengthening ?
- have we not been strengthening ?
- have you not been strengthening ?
- have they not been strengthening ?
PAST PERFECT
Affirmative
- I had strengthened
- you had strengthened
- she/he/it had strengthened
- we had strengthened
- you had strengthened
- they had strengthened
Negative
- I had not strengthened
- you had not strengthened
- she/he/it had not strengthened
- we had not strengthened
- you had not strengthened
- they had not strengthened
Interrogative
- had I strengthened ?
- had you strengthened ?
- had she/he/it strengthened ?
- had we strengthened ?
- had you strengthened ?
- had they strengthened ?
Negative - Interrogative
- had I not strengthened ?
- had you not strengthened ?
- had she/he/it not strengthened ?
- had we not strengthened ?
- had you not strengthened ?
- had they not strengthened ?
PAST PERFECT CONTINUOUS
Affirmative
- I had been strengthening
- you had been strengthening
- she/he/it had been strengthening
- we had been strengthening
- you had been strengthening
- they had been strengthening
Negative
- I had not been strengthening
- you had not been strengthening
- she/he/it had not been strengthening
- we had not been strengthening
- you had not been strengthening
- they had not been strengthening
Interrogative
- had I been strengthening ?
- had you been strengthening ?
- had she/he/it been strengthening ?
- had we been strengthening ?
- had you been strengthening ?
- had they been strengthening ?
Negative - Interrogative
- had I not been strengthening ?
- had you not been strengthening ?
- had she/he/it not been strengthening ?
- had we not been strengthening ?
- had you not been strengthening ?
- had they not been strengthening ?