Advice on verb usage

Question

Please can you advise on the following:

For the verb Andar - To say 'I was walking...' I think you can use one of the following:

Andaba or Estaba andando

When should you each one and in what circumstances?

Thanks very much

Answer 1

One use of the imperfect tense is to paint a background picture for an interrupting action (in the preterite)

I was walking to the store when my friend stopped and offered me a ride.

To contrast it with the continuous tense, imagine that I had stopped to rest and was sitting on a bench at the moment, but was still on my trip to the store, so I was still walking to the store, but not walking at that exact moment in time.

Andaba ....

The high heel of my shoe gave way while I was walking. (places emphasis on an ongoing action at the specific moment in time).

estaba andando

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