C. Now put parts A and B together to conjugate the verbs in the following sentences. Remember you need estar and -ando or-iendo. Delete the lines, they are there to remind you that you need two
words, the form of estar goes in front of the verb, and then you drop the ending on the verb and add
either -ando, -iendo

4. Los pasajeros están abrochando sus cinturones de seguridad.

5. Tú estás pasando por el control de seguridad.

6. El asistente de vuelo está caminando por el pasillo.

7. Nathan y Noah están mostrando su pasaporte.

8. Jasmine está abordando el avión.

9. Yo estoy esperando en la puerta 8A.

10. El avión está despegando.

11. El avión está aterrizando en Lima.

Explanation:

All the conjugations above belong to the present progressive tense. According to the final syllable of the verb, the -ando or-iendo part changes. In this specific case, all the verbs end in -ar. Therefore, they are conjugated with the -ando part.

well, if he says unos it is 1, if he says dos, it is 2, if he says tres, it is 3, if he says cuatro, it is 4