I am reading now. I run every day. I have just written a letter. I have been watching a film for two hours.
I was writing at three o'clock yesterday. I went to the cinema yesterday. I called him, but he had already left. I had been waiting for an hour before she arrived.
I will be writing at three o'clock tomorrow. She will arrive tomorrow. She will have painted tomorrow. He will have been playing football tomorrow.
They would be working. I would learn. You would have left. He would have been driving.