I witness you witness he witnesses we witness you witness they witness
Present continuous
I am witnessing you are witnessing he is witnessing we are witnessing you are witnessing they are witnessing
Preterite
I witnessed you witnessed he witnessed we witnessed you witnessed they witnessed
Preterite continuous
I was witnessing you were witnessing he was witnessing we were witnessing you were witnessing they were witnessing
Present perfect
I have witnessed you have witnessed he has witnessed we have witnessed you have witnessed they have witnessed
Present perfect continuous
I have been witnessing you have been witnessing he has been witnessing we have been witnessing you have been witnessing they have been witnessing
Pluperfect
I had witnessed you had witnessed he had witnessed we had witnessed you had witnessed they had witnessed
Pluperfect continuous
I had been witnessing you had been witnessing he had been witnessing we had been witnessing you had been witnessing they had been witnessing
Future
I will witness you will witness he will witness we will witness you will witness they will witness
Future continuous
I will be witnessing you will be witnessing he will be witnessing we will be witnessing you will be witnessing they will be witnessing
Future perfect
I will have witnessed you will have witnessed he will have witnessed we will have witnessed you will have witnessed they will have witnessed
Future perfect continuous
I will have been witnessing you will have been witnessing he will have been witnessing we will have been witnessing you will have been witnessing they will have been witnessing
Conditional
Present
I would witness you would witness he would witness we would witness you would witness they would witness
Present continuous
I would be witnessing you would be witnessing he would be witnessing we would be witnessing you would be witnessing they would be witnessing
Past
I would have witnessed you would have witnessed he would have witnessed we would have witnessed you would have witnessed they would have witnessed
Past continuous
I would have been witnessing you would have been witnessing he would have been witnessing we would have been witnessing you would have been witnessing they would have been witnessing