Chapter 198 Allen and Greenough's Latin Grammar Dickinson College Christopher Francese

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Sum is compounded without any change of inflection with the prepositions ab , ad , dē , in , inter , ob , prae , prō (earlier form prōd ), sub , super .

In the compound prōsum ( help ), prō retains its original d before e : PRINCIPAL PARTS: prōsum , prōdesse , prōfuī , prōfutūrus

INDICATIVE SUBJUNCTIVE Singular Plural Singular Plural PRESENT prōsum prōsumus prōsim prōsīmus prōdes prōdestis prōsīs prōsītis prōdest prōsunt prōsit prōsint IMPERFECT prōderam prōderāmus prōdessem prōdessēmus FUTURE prōderō prōderimus ---- ---- PERFECT prōfuī prōfuimus prōfuerim prōfuerimus PLUPERFECT prōfueram prōfuerāmus prōfuissem prōfuissēmus FUT. PERF. prōfuerō prōfuerimus ---- ----
IMPERATIVE PRESENT prōdes , prōdeste FUTURE prōdestō , prōdestōte INFINITIVE PRESENT prōdesse PERFECT prōfuisse FUTURE prōfutūrus esse PARTICIPLE FUTURE prōfutūrus

Sum is also compounded with the adjective potis , or pote , able , making the verb possum ( be able, can ). Possum is inflected as follows:— The forms potis sum , pote sum , etc. occur in early writers. Other early forms are potesse ; possiem , -ēs , -et ; poterint , potisit (for possit ); potestur and possitur (used with a passive infinitive, cf. § 205 . a ). PRINCIPAL PARTS: possum , posse , potuī Potuī is from an obsolete † potēre .

INDICATIVE SUBJUNCTIVE Singular Plural Singular Plural PRESENT possum possumus possim possīmus potes potestis possīs possītis potest possunt possit possint IMPERFECT poteram poterāmus possem possēmus FUTURE poterō poterimus ---- ---- PERFECT potuī potuimus potuerim potuerimus PLUPERFECT potueram potuerāmus potuissem potuissēmus FUT. PERF. potuerō potuerimus ---- ---- INFINITIVE PRES. posse PERF. potuisse

PARTICIPLE PRES. potēns (adjective), powerful

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