SIMPLE PRESENT

Affirmative

• I stiffen
• you stiffen
• she/he/it stiffens
• we stiffen
• you stiffen
• they stiffen

Negative

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

Interrogative

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

Negative - Interrogative

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

PRESENT CONTINUOUS

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

SIMPLE PAST

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PRESENT PERFECT

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PAST CONTINUOUS

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PRESENT PERFECT CONTINUOUS

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PAST PERFECT

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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

PAST PERFECT CONTINUOUS

Affirmative

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

Negative

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

Interrogative

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

Negative - Interrogative

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