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The sentence is:

> [明日]{あした}の[入]{い}り[口]{ぐち}に、[置]{お}いてかなくちゃいけないのかな？

Now I know the former part is "tomorrow, at the entrance (of our school)", and
the following phrases:

おく ーー 置いて, to put,

かな ーー is it so?

but I have no idea how to split the remaining of the latter part into pieces.

[置]{お}いて / **かなくちゃいけないの** / かな
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2020-04-29T12:18:57.347
76918
2021-02-06T02:21:14.890
2020-04-29T16:08:25.063
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question
song-lyrics contractions subsidiary-verbs
What's the structure of this lyric sentence? 「置いてかなくちゃいけないのかな」
First, 明日の入り口 probably translates literally (and somewhat poetically) to
“tomorrow’s entrance.” Second, I think that the line breaks up into 置いて + か +
なくちゃいけない + の + かな, with なくちゃいけない meaning “have to do” in this case. So the
line translates roughly to, “I guess that we have to leave [these things]
behind at the entrance to tomorrow.”

(I assume that this lyric is from 天使にふれたよ by HTT.)
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2020-04-29T18:29:11.807
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2020-04-29T18:34:21.347
2020-04-29T18:34:21.347
76918
answer
I believe the か is from ていく > てく

So  
置いていく  
置いてく  
置いてかない  
置いてかなくちゃいけない

Then consider the subject of the sentence, which is the previous two lines
なじんだ制服と上履き、ホワイトボードの落書き

the whole sentence can be translated to “have to leave the familiar uniform
and indoor shoes, and the scribble on the whiteboard (representing their time
in high school) in front of the entrance of tomorrow, right?”

It’s a very delicate way to say however sad to leave, they need to advance to
tomorrow.
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2020-05-15T03:53:26.640
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2021-02-06T02:21:14.890
2021-02-06T02:21:14.890
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answer