Learn Hardcore Spanish (Latin America): No temas hablar con el profesor si necesitas ayuda adicional. - Do not fear speaking with the teacher if you need additional help.

It means "Don't be afraid." The phrase is a negative command instructing the listener not to fear the action that follows—in this case, talking with the teacher.

Why is temas used instead of a regular imperative form?

In Spanish, when forming negative commands for the tú form, you use the present subjunctive. Temas is the second-person singular present subjunctive of temer, which is why it appears in this negative command.

Why is the verb hablar in its infinitive form after the command?

After an imperative like No temas, the following verb often remains in the infinitive. Here, hablar (meaning "to speak") serves as the direct complement, describing the action you’re encouraged to take without any additional conjugation.

Why is the preposition con used before el profesor instead of, say, a?

In Spanish, the verb hablar is typically paired with con when referring to conversing with someone. Hablar con el profesor means to have a conversation or speak with the teacher, emphasizing mutual communication rather than just addressing or speaking at someone.

What role does the clause si necesitas ayuda adicional play in the sentence?

This clause introduces a conditional idea—it translates to "if you need additional help." It explains the circumstance under which you should not be afraid to speak with the teacher, reinforcing that seeking help is encouraged when needed.

Is the sentence written in an informal or formal style, and how can you tell?

The sentence is informal because it uses the tú forms temas and necesitas. In a more formal context, you would typically use usted forms (e.g., no tema and si necesita ayuda adicional).