I assume you mean the verb conjugation of the present perfect? It's used to talk about things that started in the past, but are still going on right now (in the present) or something that happened recently.
To form it use the past participle of haber + the past participle of another word. For example:
He visto las montañas de Perú
(I have seen the mountains of Peru)
Hemos vuelto para comprar la leche
(We have returned to buy milk)
Habéis cantado muy bien
(You have/You've sung very well)
If you need more info, here is a good place: http://www.spanishdict.com/guide/spanish-present-perfect-indicative
The verb that completes this sentence is sabe. Enrique sabe hablar italiano.
dam how many do you need me to do but when is this due
Answer:
El avión sale cuando está despegando - the plane leaves when it is taking off
El avión sale cuando está aterrizando - the plane leaves when it is landing
El avión sale cuando hay una demora - the plane leaves when there is a delay
El avión sale cuando los pasajeros hacen las maletas - The plane leaves when the passengers pack their bags
Explanation:
the answer is option one
