
vor
in front of
Indicates a position that is spatially farther forward than something else.
Das Auto parkt direkt vor dem Haus.
The car is parked directly in front of the house.
before / in front of
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in front of
Indicates a position that is spatially farther forward than something else.
Das Auto parkt direkt vor dem Haus.
The car is parked directly in front of the house.

before / ago
Indicates a point in time in the past (e.g., an hour ago) or a point in time that comes before another event (e.g., before eating).
Ich habe dich vor fünf Minuten angerufen.
I called you five minutes ago.

from / with
Indicates the cause of an uncontrollable emotional or physical reaction.
Sie zitterte vor Kälte.
She was trembling from the cold.

from / against
Indicates what someone or something is protected from.
Diese Creme schützt vor Sonnenbrand.
This cream protects against sunburn.

before
Used in legal contexts to describe presence before an institution such as a court.
Der Angeklagte muss morgen vor Gericht erscheinen.
The defendant must appear before the court tomorrow.
'Vor' is a two-way preposition. It is used with the dative to describe a location (question: 'Wo?' (Where?)) and with the accusative to indicate a direction (question: 'Wohin?' (Where to?)).
Das Kind spielt vor dem Haus. (Wo? → Dativ)
The child is playing in front of the house. (Where? → dative)
As a prefix in verbs like 'vorlesen' (to read aloud), 'vorbereiten' (to prepare), or 'vorstellen' (to introduce / imagine), 'vor-' often carries the meaning of 'forward', 'first', or 'making public'.
Kannst du mir die Geschichte vorlesen?
Can you read the story aloud to me?
When 'vor' describes a time expression in the past in the sense of 'ago', the time expression is always in the dative. This construction is used with the simple past or the perfect tense.
Wir haben uns vor einem Jahr kennengelernt.
We met each other a year ago.
To express the cause of an uncontrollable physical or emotional reaction, you use 'vor' with the dative. Typical verbs are 'zittern' (to tremble), 'weinen' (to cry), 'Angst haben' (to be afraid), or 'strotzen' (to brim with).
Er konnte vor Aufregung kaum sprechen.
He could hardly speak from excitement.
Verbs that express protection, warning, or fleeing are often combined with 'vor' and the dative. Examples are 'schützen vor' (to protect from/against), 'warnen vor' (to warn about/against), and 'fliehen vor' (to flee from).
Die Impfung soll vor der Krankheit schützen.
The vaccination is meant to protect against the disease.
from / out
With emotions, „aus“ usually indicates the motivation for a conscious or deliberate action. „vor“ typically names the cause of an involuntary physical or emotional reaction. That is why someone acts „aus Angst“ (out of fear), but trembles „vor Angst“ (from fear).

Sie zittert vor Angst am ganzen Körper.
She is trembling all over from fear.
Sie läuft aus Angst schnell aus dem Haus.
She runs quickly out of the house because she is afraid.