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I heard announcements (at the station in Tokyo):

> この電車は桜木町行きです /  
>  この電車は桜木町へ行きです

(not sure, did I hear correctly?)

English version of the above:

> This train is bound for Sakuragichō.

So, I am asserting that we can use `verb stem + desu`. Is my assertion
correct? Please explain.
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2017-02-09T05:37:07.077
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2017-02-09T06:04:14.110
2017-02-09T06:02:57.867
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question
usage verbs
Is it correct to use verb stem + desu?
No.

In your example, that 「行き」 is actually a nounified(名詞化) version of the verb
stem of「行く」.

「桜木町行き」 translates to "One that goes to Sakuragichou" or "Sakuragichou-bound".

The 「です」 is not required for the nounification. That applies for any other
instance of verb-stem nounification. (i.e. うそなき- fake crying, すなあそび- sand
play)
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2017-02-09T05:53:23.943
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2017-02-09T05:53:23.943
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answer
This 行き isn't verb stem but a noun. Verb stem + desu is incorrect because a
noun or attributive form of verbs and adjectives + の are placed before です.

連用形(continuous form) of verbs often become a noun.

In addition, この電車は桜木町へ行きです is unnatural but この電車は桜木町へ行きます is natural.
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2017-02-09T05:55:06.097
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answer