non vereor ne hoc non fiat, I am not afraid that this will not
    happen;

    vereor ne exercitum firmum habere non possit, I fear that he is
    unable (non possit) to have a strong army.

C. Substantive Clauses of Result.

297.  Substantive Clauses of Result (introduced by ut, ut non) are a development of pure Result clauses, and occur with the following classes of words:—­

1.  As object clauses after verbs of doing, accomplishing (especially facio, efficio, conficio).  Thus:—­

    gravitas morbi facit ut medicina egeamus, the severity of disease
    makes us need medicine.

2.  As the subject of several impersonal verbs, particularly fit, efficitur, accidit, evenit, contingit, accedit, fieri potest, fore, sequitur, relinquitur.  Thus:—­

    ex quo efficitur, ut voluptas non sit summum bonum, from which it
    follows that pleasure is not the greatest good;

    ita fit, ut nemo esse possit beatus, thus it happens that no one can
    be happy;

    accedebat ut naves deessent, another thing was the lack of ships
    (lit. it was added that ships were lacking).

3.  As predicate or appositive after expressions like jus est, mos est, consuetudo est; also after neuter pronouns, hoc, illud, etc.  Thus:—­

    est mos hominum ut nolint eundem pluribus rebus excellere, it is the
    way of men not to wish the same person to excel in many things.

D. Substantive Clauses introduced by Quin.

298.  Substantive Clauses introduced by quin (used sometimes as subject, sometimes as object) occur after negative and interrogative expressions of doubt, omission, and the like, particularly after non dubito, I do not doubt; quis dubitat, who doubts?; non (haud) dubium est, there is no doubt.  The mood is the Subjunctive.  Examples:—­

    quis dubitat quin in virtute divitiae sint, who doubts that in virtue
    there are riches?

    non dubium erat quin venturus esset, there was no doubt that he was
    about to come.

  a.  In Nepos, Livy, and post-Augustan writers an Infinitive sometimes
  takes the place of the quin-clause after non dubito; as,—­

    non dubitamus inventos esse, we do not doubt that men were found

  b.  Non dubito, I do not hesitate, is regularly followed by the
  Infinitive, though sometimes by a quin-clause.

E. Substantive Clauses Introduced by Quod.

299. 1.  Quod, the fact that, that, introduces Substantive Clauses in the Indicative.  This construction occurs especially—­

  a) In apposition with a preceding demonstrative, as hoc, id, illud, illa,
  ex eo, inde, etc.  Thus:—­