I was learning French. I learned French. They will play upstairs. The corn is growing rapidly. Traffic is slowing down.
Traffic slows down.
Transitional Events Verbs Progressive forms indicate the beginning of an event, as opposed to the simple present tense. Momentary Verbs Progressive forms indicate little duration and suggest repetition. She is hitting her brother. He is jumping around the house. I prefer cinnamon toast, but not I am preferring cinnamon toast.