SIMPLE PRESENT
Affirmative
- I underestimate
- you underestimate
- she/he/it underestimates
- we underestimate
- you underestimate
- they underestimate
Negative
- I do not underestimate
- you do not underestimate
- she/he/it does not underestimate
- we do not underestimate
- you do not underestimate
- they do not underestimate
Interrogative
- do I underestimate ?
- do you underestimate ?
- does she/he/it underestimate ?
- do we underestimate ?
- do you underestimate ?
- do they underestimate ?
Negative - Interrogative
- do I not underestimate ?
- do you not underestimate ?
- does she/he/it not underestimate ?
- do we not underestimate ?
- do you not underestimate ?
- do they not underestimate ?
PRESENT CONTINUOUS
Affirmative
- I am underestimating
- you are underestimating
- she/he/it is underestimating
- we are underestimating
- you are underestimating
- they are underestimating
Negative
- I am not underestimating
- you are not underestimating
- she/he/it is not underestimating
- we are not underestimating
- you are not underestimating
- they are not underestimating
Interrogative
- am I underestimating ?
- are you underestimating ?
- is she/he/it underestimating ?
- are we underestimating ?
- are you underestimating ?
- are they underestimating ?
Negative - Interrogative
- am I not underestimating ?
- are you not underestimating ?
- is she/he/it not underestimating ?
- are we not underestimating ?
- are you not underestimating ?
- are they not underestimating ?
SIMPLE PAST
Affirmative
- I underestimated
- you underestimated
- she/he/it underestimated
- we underestimated
- you underestimated
- they underestimated
Negative
- I did not underestimate
- you did not underestimate
- she/he/it did not underestimate
- we did not underestimate
- you did not underestimate
- they did not underestimate
Interrogative
- did I underestimate ?
- did you underestimate ?
- did she/he/it underestimate ?
- did we underestimate ?
- did you underestimate ?
- did they underestimate ?
Negative - Interrogative
- did I not underestimate ?
- did you not underestimate ?
- did she/he/it not underestimate ?
- did we not underestimate ?
- did you not underestimate ?
- did they not underestimate ?
PRESENT PERFECT
Affirmative
- I have underestimated
- you have underestimated
- she/he/it has underestimated
- we have underestimated
- you have underestimated
- they have underestimated
Negative
- I have not underestimated
- you have not underestimated
- she/he/it has not underestimated
- we have not underestimated
- you have not underestimated
- they have not underestimated
Interrogative
- have I underestimated ?
- have you underestimated ?
- has she/he/it underestimated ?
- have we underestimated ?
- have you underestimated ?
- have they underestimated ?
Negative - Interrogative
- have I not underestimated ?
- have you not underestimated ?
- has she/he/it not underestimated ?
- have we not underestimated ?
- have you not underestimated ?
- have they not underestimated ?
PAST CONTINUOUS
Affirmative
- I was underestimating
- you were underestimating
- she/he/it was underestimating
- we were underestimating
- you were underestimating
- they were underestimating
Negative
- I was not underestimating
- you were not underestimating
- she/he/it was not underestimating
- you were not underestimating
- you were not underestimating
- they were not underestimating
Interrogative
- was I underestimating ?
- were you underestimating ?
- was she/he/it underestimating ?
- were we underestimating ?
- were you underestimating ?
- were they underestimating ?
Negative - Interrogative
- was I not underestimating ?
- were you not underestimating ?
- was she/he/it not underestimating ?
- were we not underestimating ?
- were you not underestimating ?
- were they not underestimating ?
PRESENT PERFECT CONTINUOUS
Affirmative
- I have been underestimating
- you have been underestimating
- she/he/it has been underestimating
- we have been underestimating
- you have been underestimating
- they have been underestimating
Negative
- I have not been underestimating
- you have not been underestimating
- she/he/it has not been underestimating
- we have not been underestimating
- you have not been underestimating
- they have not been underestimating
Interrogative
- have I been underestimating ?
- have you been underestimating ?
- has she/he/it been underestimating ?
- have we been underestimating ?
- have you been underestimating ?
- have they been underestimating ?
Negative - Interrogative
- have I not been underestimating ?
- have you not been underestimating ?
- has she/he/it not been underestimating ?
- have we not been underestimating ?
- have you not been underestimating ?
- have they not been underestimating ?
PAST PERFECT
Affirmative
- I had underestimated
- you had underestimated
- she/he/it had underestimated
- we had underestimated
- you had underestimated
- they had underestimated
Negative
- I had not underestimated
- you had not underestimated
- she/he/it had not underestimated
- we had not underestimated
- you had not underestimated
- they had not underestimated
Interrogative
- had I underestimated ?
- had you underestimated ?
- had she/he/it underestimated ?
- had we underestimated ?
- had you underestimated ?
- had they underestimated ?
Negative - Interrogative
- had I not underestimated ?
- had you not underestimated ?
- had she/he/it not underestimated ?
- had we not underestimated ?
- had you not underestimated ?
- had they not underestimated ?
PAST PERFECT CONTINUOUS
Affirmative
- I had been underestimating
- you had been underestimating
- she/he/it had been underestimating
- we had been underestimating
- you had been underestimating
- they had been underestimating
Negative
- I had not been underestimating
- you had not been underestimating
- she/he/it had not been underestimating
- we had not been underestimating
- you had not been underestimating
- they had not been underestimating
Interrogative
- had I been underestimating ?
- had you been underestimating ?
- had she/he/it been underestimating ?
- had we been underestimating ?
- had you been underestimating ?
- had they been underestimating ?
Negative - Interrogative
- had I not been underestimating ?
- had you not been underestimating ?
- had she/he/it not been underestimating ?
- had we not been underestimating ?
- had you not been underestimating ?
- had they not been underestimating ?