The Future Tense

472. The future denotes an action or state that will occur hereafter.

a. The future may have the force of an Imperative (§ 449.b).

b. The future is often required in a subordinate clause in Latin where in English futurity is sufficiently expressed by the main clause.

Cum aderit vidēbit.
When he is there he will see.
(cf. § 547).

Sānābimur sī volēmus. (Tusc. 3.13)
We shall be healed if we wish
(cf. § 516. a)

Note— But the present is common in future protases (§ 516.a, Note).