Ask and answer using the Present Perfect Continuous Tense.

a) Mary / teach / French / 1998.

b) The children / watch / TV / two hours.
c) Laura / play / the guitar / four years.

a) Question: How long has Mary been teaching French?

Answer: Mary has been teaching French since 1998.

b) Question: How long have the children been watching TV?

Answer: The children have been watching TV for two hours.

c) Question: How long has Laura been playing the guitar?

Answer: Laura has been playing the guitar for four years.

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