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Sentence
Span Details
どうかすると、
sometimes; occasionally; once in a while; somehow; in some way; apt to; liable to; inclined toexpression, adverb
彼
he; him; boyfriendpronoun
は
topic markergrammar
約束
promise; agreement; one's word; contract; appointment; engagement; date; convention; rule; destiny; fatenoun, suru verb
を
object markergrammar
忘れる
forget; leave behindichidan verb
ことがある。
have done (something); something has occurred; sometimes; there are times when-> 事があるexpression, verb