I litter you litter he litters we litter you litter they litter
Present continuous
I am littering you are littering he is littering we are littering you are littering they are littering
Preterite
I littered you littered he littered we littered you littered they littered
Preterite continuous
I was littering you were littering he was littering we were littering you were littering they were littering
Present perfect
I have littered you have littered he has littered we have littered you have littered they have littered
Present perfect continuous
I have been littering you have been littering he has been littering we have been littering you have been littering they have been littering
Pluperfect
I had littered you had littered he had littered we had littered you had littered they had littered
Pluperfect continuous
I had been littering you had been littering he had been littering we had been littering you had been littering they had been littering
Future
I will litter you will litter he will litter we will litter you will litter they will litter
Future continuous
I will be littering you will be littering he will be littering we will be littering you will be littering they will be littering
Future perfect
I will have littered you will have littered he will have littered we will have littered you will have littered they will have littered
Future perfect continuous
I will have been littering you will have been littering he will have been littering we will have been littering you will have been littering they will have been littering
Conditional
Present
I would litter you would litter he would litter we would litter you would litter they would litter
Present continuous
I would be littering you would be littering he would be littering we would be littering you would be littering they would be littering
Past
I would have littered you would have littered he would have littered we would have littered you would have littered they would have littered
Past continuous
I would have been littering you would have been littering he would have been littering we would have been littering you would have been littering they would have been littering