I understand you understand he understands we understand you understand they understand
Present continuous
I am understanding you are understanding he is understanding we are understanding you are understanding they are understanding
Preterite
I understood you understood he understood we understood you understood they understood
Preterite continuous
I was understanding you were understanding he was understanding we were understanding you were understanding they were understanding
Present perfect
I haveunderstood you haveunderstood he hasunderstood we haveunderstood you haveunderstood they haveunderstood
Present perfect continuous
I have been understanding you have been understanding he has been understanding we have been understanding you have been understanding they have been understanding
Pluperfect
I had understood you had understood he had understood we had understood you had understood they had understood
Pluperfect continuous
I had been understanding you had been understanding he had been understanding we had been understanding you had been understanding they had been understanding
Future
I will understand you will understand he will understand we will understand you will understand they will understand
Future continuous
I will be understanding you will be understanding he will be understanding we will be understanding you will be understanding they will be understanding
Future perfect
I will have understood you will have understood he will have understood we will have understood you will have understood they will have understood
Future perfect continuous
I will have been understanding you will have been understanding he will have been understanding we will have been understanding you will have been understanding they will have been understanding
Conditional
Present
I would understand you would understand he would understand we would understand you would understand they would understand
Present continuous
I would be understanding you would be understanding he would be understanding we would be understanding you would be understanding they would be understanding
Past
I would have understood you would have understood he would have understood we would have understood you would have understood they would have understood
Past continuous
I would have been understanding you would have been understanding he would have been understanding we would have been understanding you would have been understanding they would have been understanding