Teerapat: What were you doing yesterday at this time?
Suphatsara: I was  studying CULTURE AND THE ENGLISH LANGUAGE.

Teerapat:  What is your favorite sport and how long have you been doing it?

Suphatsara: My favorite sport is swimming. I have been doing it for 3 months.

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Teerapat asked me  what I  was doing yeasterday at this time.I replied that i was studying CULTURE AND THE ENGLISH LANGUAGE.Then,he asked me again what my favorite sport was and how long i had been doing it. I said that  i liked swimming and I had been doing it for 3 months.