SIMPLE PRESENT

Affirmative

• I concenter
• you concenter
• she/he/it concenters
• we concenter
• you concenter
• they concenter

Negative

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

Interrogative

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

Negative - Interrogative

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

PRESENT CONTINUOUS

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

SIMPLE PAST

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PRESENT PERFECT

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PAST CONTINUOUS

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PRESENT PERFECT CONTINUOUS

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PAST PERFECT

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PAST PERFECT CONTINUOUS

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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