The sign of the future in third and fourth conjugation is?

In the third and fourth conjugations of Latin verbs, the future tense is formed using the appropriate future tense endings attached to the verb stem. For the third conjugation, the future tense endings are -am, -es, -et, -emus, -etis, -ent. In the fourth conjugation, the endings are -iam, -ies, -iet, -iemus, -ietis, -ient. The stem for both conjugations is modified slightly to accommodate the future tense formation.