SIMPLE PRESENT
Affirmative
- I stumble
- you stumble
- she/he/it stumbles
- we stumble
- you stumble
- they stumble
Negative
- I do not stumble
- you do not stumble
- she/he/it does not stumble
- we do not stumble
- you do not stumble
- they do not stumble
Interrogative
- do I stumble ?
- do you stumble ?
- does she/he/it stumble ?
- do we stumble ?
- do you stumble ?
- do they stumble ?
Negative - Interrogative
- do I not stumble ?
- do you not stumble ?
- does she/he/it not stumble ?
- do we not stumble ?
- do you not stumble ?
- do they not stumble ?
PRESENT CONTINUOUS
Affirmative
- I am stumbling
- you are stumbling
- she/he/it is stumbling
- we are stumbling
- you are stumbling
- they are stumbling
Negative
- I am not stumbling
- you are not stumbling
- she/he/it is not stumbling
- we are not stumbling
- you are not stumbling
- they are not stumbling
Interrogative
- am I stumbling ?
- are you stumbling ?
- is she/he/it stumbling ?
- are we stumbling ?
- are you stumbling ?
- are they stumbling ?
Negative - Interrogative
- am I not stumbling ?
- are you not stumbling ?
- is she/he/it not stumbling ?
- are we not stumbling ?
- are you not stumbling ?
- are they not stumbling ?
SIMPLE PAST
Affirmative
- I stumbled
- you stumbled
- she/he/it stumbled
- we stumbled
- you stumbled
- they stumbled
Negative
- I did not stumble
- you did not stumble
- she/he/it did not stumble
- we did not stumble
- you did not stumble
- they did not stumble
Interrogative
- did I stumble ?
- did you stumble ?
- did she/he/it stumble ?
- did we stumble ?
- did you stumble ?
- did they stumble ?
Negative - Interrogative
- did I not stumble ?
- did you not stumble ?
- did she/he/it not stumble ?
- did we not stumble ?
- did you not stumble ?
- did they not stumble ?
PRESENT PERFECT
Affirmative
- I have stumbled
- you have stumbled
- she/he/it has stumbled
- we have stumbled
- you have stumbled
- they have stumbled
Negative
- I have not stumbled
- you have not stumbled
- she/he/it has not stumbled
- we have not stumbled
- you have not stumbled
- they have not stumbled
Interrogative
- have I stumbled ?
- have you stumbled ?
- has she/he/it stumbled ?
- have we stumbled ?
- have you stumbled ?
- have they stumbled ?
Negative - Interrogative
- have I not stumbled ?
- have you not stumbled ?
- has she/he/it not stumbled ?
- have we not stumbled ?
- have you not stumbled ?
- have they not stumbled ?
PAST CONTINUOUS
Affirmative
- I was stumbling
- you were stumbling
- she/he/it was stumbling
- we were stumbling
- you were stumbling
- they were stumbling
Negative
- I was not stumbling
- you were not stumbling
- she/he/it was not stumbling
- you were not stumbling
- you were not stumbling
- they were not stumbling
Interrogative
- was I stumbling ?
- were you stumbling ?
- was she/he/it stumbling ?
- were we stumbling ?
- were you stumbling ?
- were they stumbling ?
Negative - Interrogative
- was I not stumbling ?
- were you not stumbling ?
- was she/he/it not stumbling ?
- were we not stumbling ?
- were you not stumbling ?
- were they not stumbling ?
PRESENT PERFECT CONTINUOUS
Affirmative
- I have been stumbling
- you have been stumbling
- she/he/it has been stumbling
- we have been stumbling
- you have been stumbling
- they have been stumbling
Negative
- I have not been stumbling
- you have not been stumbling
- she/he/it has not been stumbling
- we have not been stumbling
- you have not been stumbling
- they have not been stumbling
Interrogative
- have I been stumbling ?
- have you been stumbling ?
- has she/he/it been stumbling ?
- have we been stumbling ?
- have you been stumbling ?
- have they been stumbling ?
Negative - Interrogative
- have I not been stumbling ?
- have you not been stumbling ?
- has she/he/it not been stumbling ?
- have we not been stumbling ?
- have you not been stumbling ?
- have they not been stumbling ?
PAST PERFECT
Affirmative
- I had stumbled
- you had stumbled
- she/he/it had stumbled
- we had stumbled
- you had stumbled
- they had stumbled
Negative
- I had not stumbled
- you had not stumbled
- she/he/it had not stumbled
- we had not stumbled
- you had not stumbled
- they had not stumbled
Interrogative
- had I stumbled ?
- had you stumbled ?
- had she/he/it stumbled ?
- had we stumbled ?
- had you stumbled ?
- had they stumbled ?
Negative - Interrogative
- had I not stumbled ?
- had you not stumbled ?
- had she/he/it not stumbled ?
- had we not stumbled ?
- had you not stumbled ?
- had they not stumbled ?
PAST PERFECT CONTINUOUS
Affirmative
- I had been stumbling
- you had been stumbling
- she/he/it had been stumbling
- we had been stumbling
- you had been stumbling
- they had been stumbling
Negative
- I had not been stumbling
- you had not been stumbling
- she/he/it had not been stumbling
- we had not been stumbling
- you had not been stumbling
- they had not been stumbling
Interrogative
- had I been stumbling ?
- had you been stumbling ?
- had she/he/it been stumbling ?
- had we been stumbling ?
- had you been stumbling ?
- had they been stumbling ?
Negative - Interrogative
- had I not been stumbling ?
- had you not been stumbling ?
- had she/he/it not been stumbling ?
- had we not been stumbling ?
- had you not been stumbling ?
- had they not been stumbling ?