1a) it's one o'clock
1b) it's quarter past one.
1c) it's half past one.
2a)it's three o'clock
2b)its quarter past three
2c) it's half past three
3a) it's quarter past seven
3b) it's quarter to seven.
3c) it's quarter to eight
4a)it's ten past ten.
4b) it's ten to eleven.
4c) it's ten to ten.
Your answer would be cuántos hermanos tienes?
Answer:
Hoy es jueves, veintidos de mayo (accent on the o in veintidos).
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
