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SIMPLE PRESENT

Affirmative

  • I concentrate
  • you concentrate
  • she/he/it concentrates
  • we concentrate
  • you concentrate
  • they concentrate

Negative

  • I do not concentrate
  • you do not concentrate
  • she/he/it does not concentrate
  • we do not concentrate
  • you do not concentrate
  • they do not concentrate
 

Interrogative

  • do I concentrate ?
  • do you concentrate ?
  • does she/he/it concentrate ?
  • do we concentrate ?
  • do you concentrate ?
  • do they concentrate ?

Negative - Interrogative

  • do I not concentrate ?
  • do you not concentrate ?
  • does she/he/it not concentrate ?
  • do we not concentrate ?
  • do you not concentrate ?
  • do they not concentrate ?

PRESENT CONTINUOUS

Affirmative

  • I am concentrating
  • you are concentrating
  • she/he/it is concentrating
  • we are concentrating
  • you are concentrating
  • they are concentrating

Negative

  • I am not concentrating
  • you are not concentrating
  • she/he/it is not concentrating
  • we are not concentrating
  • you are not concentrating
  • they are not concentrating
 

Interrogative

  • am I concentrating ?
  • are you concentrating ?
  • is she/he/it concentrating ?
  • are we concentrating ?
  • are you concentrating ?
  • are they concentrating ?

Negative - Interrogative

  • am I not concentrating ?
  • are you not concentrating ?
  • is she/he/it not concentrating ?
  • are we not concentrating ?
  • are you not concentrating ?
  • are they not concentrating ?

SIMPLE PAST

Affirmative

  • I concentrated
  • you concentrated
  • she/he/it concentrated
  • we concentrated
  • you concentrated
  • they concentrated

Negative

  • I did not concentrate
  • you did not concentrate
  • she/he/it did not concentrate
  • we did not concentrate
  • you did not concentrate
  • they did not concentrate
 

Interrogative

  • did I concentrate ?
  • did you concentrate ?
  • did she/he/it concentrate ?
  • did we concentrate ?
  • did you concentrate ?
  • did they concentrate ?

Negative - Interrogative

  • did I not concentrate ?
  • did you not concentrate ?
  • did she/he/it not concentrate ?
  • did we not concentrate ?
  • did you not concentrate ?
  • did they not concentrate ?

PRESENT PERFECT

Affirmative

  • I have concentrated
  • you have concentrated
  • she/he/it has concentrated
  • we have concentrated
  • you have concentrated
  • they have concentrated

Negative

  • I have not concentrated
  • you have not concentrated
  • she/he/it has not concentrated
  • we have not concentrated
  • you have not concentrated
  • they have not concentrated
 

Interrogative

  • have I concentrated ?
  • have you concentrated ?
  • has she/he/it concentrated ?
  • have we concentrated ?
  • have you concentrated ?
  • have they concentrated ?

Negative - Interrogative

  • have I not concentrated ?
  • have you not concentrated ?
  • has she/he/it not concentrated ?
  • have we not concentrated ?
  • have you not concentrated ?
  • have they not concentrated ?

PAST CONTINUOUS

Affirmative

  • I was concentrating
  • you were concentrating
  • she/he/it was concentrating
  • we were concentrating
  • you were concentrating
  • they were concentrating

Negative

  • I was not concentrating
  • you were not concentrating
  • she/he/it was not concentrating
  • you were not concentrating
  • you were not concentrating
  • they were not concentrating
 

Interrogative

  • was I concentrating ?
  • were you concentrating ?
  • was she/he/it concentrating ?
  • were we concentrating ?
  • were you concentrating ?
  • were they concentrating ?

Negative - Interrogative

  • was I not concentrating ?
  • were you not concentrating ?
  • was she/he/it not concentrating ?
  • were we not concentrating ?
  • were you not concentrating ?
  • were they not concentrating ?

PRESENT PERFECT CONTINUOUS

Affirmative

  • I have been concentrating
  • you have been concentrating
  • she/he/it has been concentrating
  • we have been concentrating
  • you have been concentrating
  • they have been concentrating

Negative

  • I have not been concentrating
  • you have not been concentrating
  • she/he/it has not been concentrating
  • we have not been concentrating
  • you have not been concentrating
  • they have not been concentrating
 

Interrogative

  • have I been concentrating ?
  • have you been concentrating ?
  • has she/he/it been concentrating ?
  • have we been concentrating ?
  • have you been concentrating ?
  • have they been concentrating ?

Negative - Interrogative

  • have I not been concentrating ?
  • have you not been concentrating ?
  • has she/he/it not been concentrating ?
  • have we not been concentrating ?
  • have you not been concentrating ?
  • have they not been concentrating ?

PAST PERFECT

Affirmative

  • I had concentrated
  • you had concentrated
  • she/he/it had concentrated
  • we had concentrated
  • you had concentrated
  • they had concentrated

Negative

  • I had not concentrated
  • you had not concentrated
  • she/he/it had not concentrated
  • we had not concentrated
  • you had not concentrated
  • they had not concentrated
 

Interrogative

  • had I concentrated ?
  • had you concentrated ?
  • had she/he/it concentrated ?
  • had we concentrated ?
  • had you concentrated ?
  • had they concentrated ?

Negative - Interrogative

  • had I not concentrated ?
  • had you not concentrated ?
  • had she/he/it not concentrated ?
  • had we not concentrated ?
  • had you not concentrated ?
  • had they not concentrated ?

PAST PERFECT CONTINUOUS

Affirmative

  • I had been concentrating
  • you had been concentrating
  • she/he/it had been concentrating
  • we had been concentrating
  • you had been concentrating
  • they had been concentrating

Negative

  • I had not been concentrating
  • you had not been concentrating
  • she/he/it had not been concentrating
  • we had not been concentrating
  • you had not been concentrating
  • they had not been concentrating
 

Interrogative

  • had I been concentrating ?
  • had you been concentrating ?
  • had she/he/it been concentrating ?
  • had we been concentrating ?
  • had you been concentrating ?
  • had they been concentrating ?

Negative - Interrogative

  • had I not been concentrating ?
  • had you not been concentrating ?
  • had she/he/it not been concentrating ?
  • had we not been concentrating ?
  • had you not been concentrating ?
  • had they not been concentrating ?