Learn Spanish (Spain): ¿Ha escalado ella esa montaña alguna vez?

In questions about life experiences, alguna vez asks if an event has happened at least once. It literally means 'some time', but in English we naturally say 'ever' when asking 'Have you ever...?'. Remember that alguna vez is often placed at the end of the question in Spanish.

Why is ella placed after ha escalado?

In Spanish questions, the subject (ella) is usually placed after the verb. A very important rule to remember is that you can never separate the helping verb (ha) and the past participle (escalado). So, you cannot say ¿Ha ella escalado...? like you do in English with 'Has she climbed...?'.

How do we form the verb ha escalado?

This is the tense we use to talk about life experiences up to now. You make it with the present tense of the helping verb haber (here it is ha for 'she') and the past participle of the action verb. To get the past participle of escalar (to climb), you drop the -ar ending and add -ado.

Why is it esa montaña instead of esta montaña?

Esa means 'that', referring to a mountain that is at a distance from the speaker. If the speaker were standing right on the mountain, they would say esta montaña (this mountain). Both are feminine to match the noun montaña.