SIMPLE PRESENT

Affirmative

• I decertify
• you decertify
• she/he/it decertifies
• we decertify
• you decertify
• they decertify

Negative

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

Interrogative

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

Negative - Interrogative

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

PRESENT CONTINUOUS

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

SIMPLE PAST

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PRESENT PERFECT

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PAST CONTINUOUS

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PRESENT PERFECT CONTINUOUS

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PAST PERFECT

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PAST PERFECT CONTINUOUS

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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