Breakdown of Al profesor le enoja que ustedes hablen mucho.
el profesor
teacher
hablar
to speak / to talk
ustedes
you (plural)
mucho
many / a lot
Questions & Answers about Al profesor le enoja que ustedes hablen mucho.
Why is it hablen and not hablan?
Why is the sentence structured as Al profesor le enoja instead of just El profesor enoja?
Verbs of emotion like enojar often work exactly like gustar. The literal translation is closer to "It angers the teacher." The thing causing the emotion (that you talk a lot) is the actual subject of the sentence, and the teacher is the indirect object receiving the anger, which is why we use the indirect object pronoun le.
Why do we have both Al profesor and le? Isn't that repetitive?
It is a bit repetitive to English speakers, but it is standard in Spanish! You almost always need the indirect object pronoun (le) with verbs like this. The phrase al profesor is simply added to clarify exactly who the le is referring to.
Is the pronoun ustedes required here?