when do you use "yo," "usted," "el," and "la?"

Question

I mean, do you say "tiene que ir..." or "el tiene que ir...?" Or "El puede..." or "puede...?"

Answer 1

If you are talking about personal pronouns, have a look at this lesson for yo, usted and él.

Conjugating

La is the feminine definite article and is used to indicate feminine nouns, la casa, la mujer etc, el is the masculine definite article and is used to indicate masculine nouns, el coche, el radiador, etc.

Eddy