Postby thegooseking » June 18th, 2015 12:48 pm
rayman-san,
I don't think it's fruitful to think of nominalisation as like adding '-ing' to an English word. Japanese doesn't always use a noun where English does, and sometimes uses a noun where English doesn't. Plus, an '-ing' word in English can either be a noun or a participle, which confuses the matter.
With that out of the way, mono isn't a nominaliser. No is a nominaliser that may be* etymologically related to mono.
Both mono and koto mean 'thing', but they have a bit of a different sense. I tend to think of mono for being more about physical, substantial things, while koto is more about abstract things like matters or affairs.
If you see no or koto after the dictionary form of a verb, it means the verb is nominalised. Generally you use no for verbs that are 'immediate' in terms of time or location: something that's happening right now (or 'right now' relative to another clause in the sentence), something you're waiting to happen, something you stop happening, etc. You use koto for verbs that are more distant or considered in abstract - think of [verb]koto ga dekinai - you're not saying you can't do it right now; you're saying you can't do it in general.
If you see mono as a suffix to a dictionary form of a verb, it usually indicates that we're either talking about an item related to a verb, or that we're talking about a reason or cause for something. For instance, taberu mono means "something to eat" (not to be confused with tabemono which means "food", even though they have similar meanings). Or O-toshiyori wa, yukkuri yasumu mono desu. Here, mono indicates that toshiyori (being elderly) is the reason for yasumu (resting). This carries a bit of a sense of suggestion, too - being elderly is a reason you should rest, more than that it's a reason for resting.
小狼
* Etymology for native Japanese words, as opposed to words introduced from China, is always a matter of guesswork, since there are, of course, no written records from before China introduced writing to Japan.