[1024.] A Simple Sentence is one which has only one subject and one predicate.
Thus, Rhodanus fluit, the Rhone flows, is a simple sentence: the subject is Rhodanus and the predicate is fluit.
[1025.] The sentence may be declarative, stating a fact, exclamatory, crying out about something, interrogative, asking a question, or imperative, giving a command.
[The Subject.]
[1026.] The subject is a substantive, or any word or words having the value of a substantive.
[1027.] The subject of a verb is in the nominative case.
[1028.] The subject may be expressed, or may be merely indicated by the person ending.
[1029.] (1.) With the first or the second person, the subject is expressed by a personal pronoun (ego tū, nōs vōs) only when somewhat emphatic, or in an indignant question. Otherwise the verb of the first or second person is not attended by a personal pronoun: as, eram, I was, erās, thou wert.
[1030.] The subject is regularly omitted when it is general and indefinite, in the first person plural; as, intellegimus, we understand; and second person singular, as: putārēs, you, or anybody would have thought.
[1031.] The subject of the first or second person is sometimes a substantive, contrary to the English idiom: as, Hannibal petō pācem, I Hannibal am suing for peace. pars spectātōrum scīs, a part of you spectators knows. exoriāre aliquis nostrīs ex ossibus ultor, from out our bones mayst some avenger spring. trecentī coniūrāvimus, three hundred of us have sworn an oath together.