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) ca...

When we have a する verb (e.g. 支度する、案内する、心配する), is it true that we could optionally insert an を particle in between the noun and the する? Because in the example sentences here and here, we can see this usage (the usage of を particle appearing between the noun and the する). So basically am I right t...