I think you think he thinks we think you think they think
Present continuous
I am thinking you are thinking he is thinking we are thinking you are thinking they are thinking
Preterite
I thought you thought he thought we thought you thought they thought
Preterite continuous
I was thinking you were thinking he was thinking we were thinking you were thinking they were thinking
Present perfect
I havethought you havethought he hasthought we havethought you havethought they havethought
Present perfect continuous
I have been thinking you have been thinking he has been thinking we have been thinking you have been thinking they have been thinking
Pluperfect
I had thought you had thought he had thought we had thought you had thought they had thought
Pluperfect continuous
I had been thinking you had been thinking he had been thinking we had been thinking you had been thinking they had been thinking
Future
I will think you will think he will think we will think you will think they will think
Future continuous
I will be thinking you will be thinking he will be thinking we will be thinking you will be thinking they will be thinking
Future perfect
I will have thought you will have thought he will have thought we will have thought you will have thought they will have thought
Future perfect continuous
I will have been thinking you will have been thinking he will have been thinking we will have been thinking you will have been thinking they will have been thinking
Conditional
Present
I would think you would think he would think we would think you would think they would think
Present continuous
I would be thinking you would be thinking he would be thinking we would be thinking you would be thinking they would be thinking
Past
I would have thought you would have thought he would have thought we would have thought you would have thought they would have thought
Past continuous
I would have been thinking you would have been thinking he would have been thinking we would have been thinking you would have been thinking they would have been thinking