I'm having trouble understanding some aspects of the Past Continuous tense.
1) I'm struggling to find an example with "from...to" in grammar books. What tenses should I use with this time frame? It seems like it is a particular time + action in progress (therefore Continuous), but it's also a finished time frame (therefore not Continuous).
I ... football from 6 to 8 yesterday.
I ... football from 6 to 8 today.
I ... football from 6 to 8 tomorrow.
2) One of my grammar books gives two rules.
- We use Past Simple to talk about longer past actions.
Mary and Tim studied physics at university.
- We use Past Continuous to describe an action or situation in the past that continued for a period of time.
It was snowing heavily all that day.
How can I distinguish between these rules? Perhaps, there are some particular time expressions or differences in speaker's attitude. But I don't always see it.