19. The subject of the infinitive is in the accusative.  Sec. 214.

  20. The place to which is expressed by ad\ or in\ with the
  accusative.  Before names of towns, small islands, domus\, and rus\
  the preposition is omitted.  Secs. 263, 266.

  21. Duration of time and extent of space are expressed by the
  accusative.  Sec. 336.

  22. Verbs of making, choosing, calling, showing, and the like, may
  take a predicate accusative along with the direct object.  With the
  passive voice the two accusatives become nominatives.  Sec. 392.

Ablative Case

  23. Cause is denoted by the ablative without a preposition.  This
  answers the question Because of what?  Sec. 102.

  24. Means is denoted by the ablative without a preposition.  This
  answers the question By means of what? or With what?  Sec. 103.

  25. Accompaniment is denoted by the ablative with cum\.  This
  answers the question With whom?  Sec. 104.

  26. The ablative with cum\ is used to denote the manner of an
  action. Cum\ may be omitted, if an adjective is used with the
  ablative.  This answers the question How? or In what manner?  Sec. 105.

  27. With comparatives and words implying comparison the ablative is
  used to denote the measure of difference.  Sec. 317.

  28. The ablative of a noun or pronoun with a present or perfect
  participle in agreement is used to express attendant circumstance. 
  This is called the ablative absolute.  Sec. 381.

  29. 1.  Descriptions of physical characteristics are expressed by the
    ablative with a modifying adjective.  Sec. 444.

    2.  Descriptions involving neither numerical statements nor physical
    characteristics may be expressed by either the genitive or the
    ablative with a modifying adjective.  Sec. 445.

  30. The ablative is used to denote in what respect something is
  true.  Sec. 398.

31. The place from which is expressed by a\ or ab\, de:\, e:\ or ex\ with the separative ablative.  This answers the question Whence?  Before names of towns, small islands, domus\, and rus\ the preposition is omitted.  Secs. 264, 266.

  _32._ Words expressing separation or deprivation require an ablative
  to complete their meaning.  This is called the _ablative of
  separation_.  Sec. 180.

  33. The word expressing the person from whom an action starts, when
  not the subject, is put in the ablative with the preposition a\ or
  ab\.  This is called the ablative of the personal agent.  Sec. 181.

  34. The comparative degree, if quam\ is omitted, is followed by the
  separative ablative.  Sec. 309.