Learn Spanish (Latin America): Veo la casa de mi amiga.

In Spanish, the verb ending usually tells you who is doing the action, so you don't always need subject pronouns like yo (I). Veo specifically means "I see" (from the verb ver). You can say yo veo, but native speakers usually drop the yo unless they want to add emphasis.

Why is the verb veo and not "vo"?

The infinitive verb for "to see" is ver. Normally, to make the "I" form of a verb that ends in -er, you drop the -er and add -o. But ver is slightly irregular! Instead of dropping both letters to make "vo", it keeps the e, becoming veo.

How does Spanish say "my friend's house" without an apostrophe 's'?

Spanish doesn't use an apostrophe 's' to show ownership. Instead, you use the pattern: [Thing owned] + de + [Owner]. To say "my friend's house", you literally have to say "the house of my friend" (la casa de mi amiga).

How do we know the friend is female?

In Spanish, nouns often change their ending based on gender. Amiga ends in -a, which tells us this is a female friend. If the speaker were talking about a male friend, the sentence would end with mi amigo.