Would the answer be in the subjunctive or future tense?
¿Crees que ellos llegarán mañana? No, no creo que ellos ____________.
2 Answers
Subjunctive.
Creer, pensar, saber, comprender, entender, reconocer, opinar, considerar, juzgar, olvidar, decidir, suponer, comprobar and many others are all verbs that require the Indicative when used in positive form. For example: "Creo que vendrá a tiempo." When used in negative form, however, they require the Subjunctive. Example: "No creo que vengan a tiempo."
IMPORTANT: If you use some of these verbs in negative interrogative or negative imperative form, then you should again use the Indicative. Example: "¿No crees que vendrán?" ... "¡No creas que vendrán!"
You answer first and I´ll answer second.