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Sentence

彼かれは籠かご耳みみだから、大だい事じなことはメモしておいたほうがいいよ。

Span Details

籠かご耳みみ

memory like a sieve; in one ear and out the other

noun

therefore; because of that

大だい事じ

important; serious; crucial

na-adjective, noun

adnominal form of the copula (after a na-adjective or noun)

thing; matter; the fact that; doing

noun, noun suffix

note; memo; memorandum

noun, suru verb

light/support verb with a noun or noun-like phrase

-> するgrammar

do in preparation

-> ておくgrammar

past tense or completed action

ほうがいい

had better; should; had better not; should not

-> 方がいいexpression, i-adjective

emphatic sentence-ending marker