Is this wrong?
Tienen que hacen las maletas. Salen para Monterrey mañana.
The first sentence is wrong. The infinitive "hacer" must be used instead of "hacen".
Conjugated forms of "tener que" are followed by the infinitive of the following verb.
whenever the word 'que' is used in a sentence and a verb follows it, the verb will always be in the unconjugated form.
Tenemos que IR al parque.
tienen que ESTUDIAR.
tengo que HACER mi tarea.
Yes, there is a mistake in your sentence. The correct sentence should be "Tienen que hacer las maletas. Salen para Monterrey mañana." The error is in the verb "hacen," which should be "hacer" since it is an infinitive form of the verb.
To determine if a sentence is grammatically correct, you can follow these steps:
1. Identify the subject: In this case, "tienen" is the subject, which means "they have" in English.
2. Identify the verb: The verb in the sentence is "hacen," which means "they do" or "they make" in English.
3. Consider verb conjugation: Conjugating verbs correctly is essential in Spanish. In this sentence, the verb "hacer" (meaning "to do" or "to make") should be conjugated as "hacen" for the subject "they." However, since it is followed by another verb, "hacen" should be in the infinitive form, which is "hacer."
By applying these steps, you can identify and correct any grammatical errors in a sentence.