I howl you howl he howls we howl you howl they howl
Present continuous
I am howling you are howling he is howling we are howling you are howling they are howling
Preterite
I howled you howled he howled we howled you howled they howled
Preterite continuous
I was howling you were howling he was howling we were howling you were howling they were howling
Present perfect
I have howled you have howled he has howled we have howled you have howled they have howled
Present perfect continuous
I have been howling you have been howling he has been howling we have been howling you have been howling they have been howling
Pluperfect
I had howled you had howled he had howled we had howled you had howled they had howled
Pluperfect continuous
I had been howling you had been howling he had been howling we had been howling you had been howling they had been howling
Future
I will howl you will howl he will howl we will howl you will howl they will howl
Future continuous
I will be howling you will be howling he will be howling we will be howling you will be howling they will be howling
Future perfect
I will have howled you will have howled he will have howled we will have howled you will have howled they will have howled
Future perfect continuous
I will have been howling you will have been howling he will have been howling we will have been howling you will have been howling they will have been howling
Conditional
Present
I would howl you would howl he would howl we would howl you would howl they would howl
Present continuous
I would be howling you would be howling he would be howling we would be howling you would be howling they would be howling
Past
I would have howled you would have howled he would have howled we would have howled you would have howled they would have howled
Past continuous
I would have been howling you would have been howling he would have been howling we would have been howling you would have been howling they would have been howling