The verb "to sleep"
How would I use the verb "dormir" in this sentence: Yo necesito ______ ocho horas todas las noches. Do I need to change the verb to to "duermo" or is the use of the verb necesito all I need to make the sentence correct? Thanks!
I believe all you have to say is "dormir".
"Yo necesito dormir ocho horas todas las noches".
to need 8 hours of sleep is a verbal phrase acting as a noun. It is what you need: the direct complement of the sentence. The infinitive form of the verb is often used as a noun in Spanish (after prepositions, e.g.).
Necesito dormir ocho horas todas las noches (you could als use: cada noche)
Think of it as "I need TO sleep." If you said "Necesito duermo." That would be saying "I need I sleep."