SIMPLE PRESENT
Affirmative
- I understand
- you understand
- she/he/it understands
- we understand
- you understand
- they understand
Negative
- I do not understand
- you do not understand
- she/he/it does not understand
- we do not understand
- you do not understand
- they do not understand
Interrogative
- do I understand ?
- do you understand ?
- does she/he/it understand ?
- do we understand ?
- do you understand ?
- do they understand ?
Negative - Interrogative
- do I not understand ?
- do you not understand ?
- does she/he/it not understand ?
- do we not understand ?
- do you not understand ?
- do they not understand ?
PRESENT CONTINUOUS
Affirmative
- I am understanding
- you are understanding
- she/he/it is understanding
- we are understanding
- you are understanding
- they are understanding
Negative
- I am not understanding
- you are not understanding
- she/he/it is not understanding
- we are not understanding
- you are not understanding
- they are not understanding
Interrogative
- am I understanding ?
- are you understanding ?
- is she/he/it understanding ?
- are we understanding ?
- are you understanding ?
- are they understanding ?
Negative - Interrogative
- am I not understanding ?
- are you not understanding ?
- is she/he/it not understanding ?
- are we not understanding ?
- are you not understanding ?
- are they not understanding ?
SIMPLE PAST
Affirmative
- I understood
- you understood
- she/he/it understood
- we understood
- you understood
- they understood
Negative
- I did not understand
- you did not understand
- she/he/it did not understand
- we did not understand
- you did not understand
- they did not understand
Interrogative
- did I understand ?
- did you understand ?
- did she/he/it understand ?
- did we understand ?
- did you understand ?
- did they understand ?
Negative - Interrogative
- did I not understand ?
- did you not understand ?
- did she/he/it not understand ?
- did we not understand ?
- did you not understand ?
- did they not understand ?
PRESENT PERFECT
Affirmative
- I have understood
- you have understood
- she/he/it has understood
- we have understood
- you have understood
- they have understood
Negative
- I have not understood
- you have not understood
- she/he/it has not understood
- we have not understood
- you have not understood
- they have not understood
Interrogative
- have I understood ?
- have you understood ?
- has she/he/it understood ?
- have we understood ?
- have you understood ?
- have they understood ?
Negative - Interrogative
- have I not understood ?
- have you not understood ?
- has she/he/it not understood ?
- have we not understood ?
- have you not understood ?
- have they not understood ?
PAST CONTINUOUS
Affirmative
- I was understanding
- you were understanding
- she/he/it was understanding
- we were understanding
- you were understanding
- they were understanding
Negative
- I was not understanding
- you were not understanding
- she/he/it was not understanding
- you were not understanding
- you were not understanding
- they were not understanding
Interrogative
- was I understanding ?
- were you understanding ?
- was she/he/it understanding ?
- were we understanding ?
- were you understanding ?
- were they understanding ?
Negative - Interrogative
- was I not understanding ?
- were you not understanding ?
- was she/he/it not understanding ?
- were we not understanding ?
- were you not understanding ?
- were they not understanding ?
PRESENT PERFECT CONTINUOUS
Affirmative
- I have been understanding
- you have been understanding
- she/he/it has been understanding
- we have been understanding
- you have been understanding
- they have been understanding
Negative
- I have not been understanding
- you have not been understanding
- she/he/it has not been understanding
- we have not been understanding
- you have not been understanding
- they have not been understanding
Interrogative
- have I been understanding ?
- have you been understanding ?
- has she/he/it been understanding ?
- have we been understanding ?
- have you been understanding ?
- have they been understanding ?
Negative - Interrogative
- have I not been understanding ?
- have you not been understanding ?
- has she/he/it not been understanding ?
- have we not been understanding ?
- have you not been understanding ?
- have they not been understanding ?
PAST PERFECT
Affirmative
- I had understood
- you had understood
- she/he/it had understood
- we had understood
- you had understood
- they had understood
Negative
- I had not understood
- you had not understood
- she/he/it had not understood
- we had not understood
- you had not understood
- they had not understood
Interrogative
- had I understood ?
- had you understood ?
- had she/he/it understood ?
- had we understood ?
- had you understood ?
- had they understood ?
Negative - Interrogative
- had I not understood ?
- had you not understood ?
- had she/he/it not understood ?
- had we not understood ?
- had you not understood ?
- had they not understood ?
PAST PERFECT CONTINUOUS
Affirmative
- I had been understanding
- you had been understanding
- she/he/it had been understanding
- we had been understanding
- you had been understanding
- they had been understanding
Negative
- I had not been understanding
- you had not been understanding
- she/he/it had not been understanding
- we had not been understanding
- you had not been understanding
- they had not been understanding
Interrogative
- had I been understanding ?
- had you been understanding ?
- had she/he/it been understanding ?
- had we been understanding ?
- had you been understanding ?
- had they been understanding ?
Negative - Interrogative
- had I not been understanding ?
- had you not been understanding ?
- had she/he/it not been understanding ?
- had we not been understanding ?
- had you not been understanding ?
- had they not been understanding ?