Analyzer
Sentence analysis
7Spans
Sentence
Span Details
何年
how many years; how long; what yearnoun
も
also; evengrammar
秘密
secret; confidential; private; mystery; secret (to success, etc.); key; esoteric teachingsnoun, na-adjective
に
direction, time, indirect object, or target markergrammar
し
light/support verb with a noun or noun-like phrase-> するgrammar
てき
change continuing toward the present point-> てくるgrammar
た。
past tense or completed actiongrammar