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
1. I spend time with my friends after school.
2.Marisol and Juan sing a lot in music class.
3.We look at the computers in technology class.
4.You live in the United States.
5.The students write for spanish class.
1. Translate: do you pay a lot for your back pack?
2.Translate: does she roller skate in the park?
3.Translate:do you see Rosa and Ellena in the school fotos?
4.Translate: Were do you guys eat?
5.Translate: Who writes good notes?
Tengo miedo de que fernando no mejore su comportamiento y esto traiga conflictos a nuestra amistad.
If the question is to make it into a proper sentence then you take out en so it says, Muchos jóvenes llevan todo lo que necesitan cuando viajan.
