344. The present subjunctive is inflected as follows: 

     CONJ.  I CONJ.  II CONJ.  III CONJ.  IV
     ACTIVE VOICE
     SINGULAR
  1. a’mem mo’neam re’gam ca’piam au’diam
  2. a’me:s mo’nea:s re’ga:s ca’pia:s au’dia:s
  3. a’met mo’neat re’gat ca’piat au’diat

PLURAL
1. ame:’mus   monea:’mus    rega:’mus    capia:’mus    audia:’mus
2. ame:’tis   monea:’tis    rega:’tis    capia:’tis    audia:’tis
3. a’ment     mo’neant      re’gant      ca’piant      au’diant

PASSIVE VOICE
SINGULAR
1. a’mer       mo’near       re’gar       ca’piar       au’diar
2. ame:’ris    monea:’ris    rega:’ris    capia:’ris    audia:’ris
(-re)         (-re)        (-re)         (-re)         (-re)
3. ame:’tur    monea:’tur    rega:’tur    capia:’tur    audia:’tur

   PLURAL

1. ame:’mur monea:’mur rega:’mur capia:’mur audia:’mur
2. ame:’mini:  monea:’mini:  rega:’mini:  capia:’mini:  audia:’mini: 
3. amen’tur monean’tur regan’tur capian’tur audian’tur

a. The present subjunctive is formed from the present stem.

b. The mood sign of the present subjunctive is -e:- in the first conjugation and -a:- in the others.  It is shortened in the usual places (cf.  Sec. 12), and takes the place of the final vowel of the stem in the first and third conjugations, but not in the second and fourth.

    c. The personal endings are the same as in the indicative.

    d. In a similar way inflect the present subjunctive of curo\,
    iubeo\, sumo\, iacio\, munio\.

345. The present subjunctive of the irregular verb sum\ is inflected as follows: 

{ 1.  sim             { 1.  si:mus
SING. { 2.  si:s     PLURAL { 2.  si:tis
{ 3.  sit             { 3.  sint

346. The Indicative and Subjunctive Compared.

1.  The two most important of the finite moods are the indicative and the subjunctive.  The indicative deals with facts either real or assumed.  If, then, we wish to assert something as a fact or to inquire after a fact, we use the indicative.

2.  On the other hand, if we wish to express a desire or wish, a purpose, a possibility, an expectation, or some such notion, we must use the subjunctive.  The following sentences illustrate the difference between the indicative and the subjunctive ideas.

INDICATIVE IDEAS SUBJUNCTIVE IDEAS