彼の発言を疑うべきではない

N5 彼 kare he N1 発言 hatsugen utterance, speech, proposal N3 疑う utagau doubt, suspect, distrust N5 では dewa then, well, in that case N5 ない nai there isn't, doesn't have

N3 彼 hi / kare, kano, ka.no he, that, the N4 発 hatsu, hotsu / ta.tsu, aba.ku, oko.ru, tsuka.wasu, hana.tsu departure, discharge, publish N4 言 gen, gon / i.u, koto say, word, dire N3 疑 gi / utaga.u doubt, distrust, be suspicious

N3 〜べきではない beki de wa nai Indicates moral prohibition or negative recommendation, attaches to a verb, means should not do N3 〜べき beki Indicates duty recommendation or moral obligation, attaches to a verb, means should do or it is proper to do N5 〜を o Marks the direct object of an action, appears before the verb, shows what receives the action N5 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context N5 〜の no Indicates possession, relation between nouns, nominal explanation, or turns a verb into a noun phrase N5 〜は wa Marks the topic of the sentence, indicates what the sentence is about, can contrast with another element, organizes main information