2. With opus est (rarely ūsus est), there is need; as,—
duce nōbīs opus est, we need a leader.
a. A Neuter Pronoun or Adjective often stands as subject with opus as predicate. Thus:—
hōc mihi opus est, this is necessary for me.
b. An ordinary substantive rarely stands as subject. Thus dux nōbīs opus est is a rare form of expression.
c. Note the occasional use of a perfect passive participle with opus est; as,—
opus est properātō, there is need of haste.
3. With nītor, innīxus, and frētus; as,—
nītitur hastā, he rests on a spear (lit. supports himself by a spear);
frētus virtūte, relying on virtue (lit. supported by virtue).
4. With continērī, cōnsistere, cōnstāre, consist of; as,—
nervīs et ossibus continentur, they consist of sinews and bones (lit. they are held together by sinews and bones);
mortālī cōnsistit corpore mundus, the world consists of mortal substance (lit. holds together by means of, etc.).