How is an indirect statement formed in Greek?

There are three constructions that can be used, depending on the introductory verb:A) The ὁτι construction:Used for verbs of saying (except φημι)The 'that...' clause behaves like an independent sentence with its subject in the nominativeKeep the mood and tense of the original statementAfter a main verb in the past tense, the optative can be used for a less vivid statementNegative: οὐB) The infinitive construction:Used for verbs of thinking, considering, hoping, promising and swearing (including φημι)The subject of the 'that' clause is accusative if it is different from the subject of the introductory verb (nominative if it is the same)Negative: οὐThe infinitive keeps the tense of the original statement...unless it is a verb of hoping, promising or swearing, which are followed by a future infinitive (negative: μη)C) The participle construction:Used for verbs that express physical or intellectual perception (e.g. αἰσθανομαι, ἀκουω, γιγνωσκω, εὑρισκω)The subject of the 'that' clause is accusative if it is different from the subject of the introductory verb (nominative if it is the same)The participle keeps the tense of the original statement