Question

They have been teaching English for many nesecito pasar esta pregunta
a Present perfect continuous

Answer 1

Respuesta:

Do they have been teaching english for many(time)?

Answer 2

Respuesta:

ya está en present perfect continuous

Explicación:

la estructura del present perfect continuous es

have/has + been + verb ing.

ex: I have been studying all day.

si quieres cambiar a pregunta sería ¨have they been teaching English for many ...?¨