Difference Between べんきょうする and べんきょうをする

Question

What is the difference between べんきょうする and べんきょうをする?

possible duplicate of can we optionally include (or exclude) an を particle in between the noun of the する-verb and the する itself? — Flaw♦, Dec 15 '11 at 15:40
@Flaw: Thanks for pointing. That is really nice. I didn't find it when I was posting my question. — Mudassir, Dec 16 '11 at 4:23

fefe · Accepted Answer · 2011-12-15 13:08:49Z

勉強{べんきょう}する is one verb. 勉強をする is a phrase.

They don't seem to have any difference in meaning, but the usage may differ.

For 勉強する, an objective can be added:

日本語{にほんご}を勉強する learn Japanese
~~日本語を勉強をする~~ is wrong

For 勉強をする, adjectives (or words or phrases that can be used as adjectives) can be used before 勉強:

しばらく医者{いしゃ}になるための勉強をする study for a while to become a doctor

While 勉強する cannot be used in this way.

@atlantiza Yes. That would be more straightforwardly contrasted with 日本語を勉強する. — user458, Dec 15 '11 at 21:16

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