I found it in a website: 心配するな。 Meaning: "Don't worry."
I only didn't understand the use for な.
When I put する, in this case, does it transform 心配 in a verb?
Adding the verb suru to some nouns makes them usable as verbs - for example,ai means 'love' (sorry I'm on my work computer with no Japanese support), ai suru means 'to love' - adding na to the end of the dictionary form of a verb makes it a negative command.
愛する is a bit special and might not be appropriate for an example of -suru verbs.;-)
Many -suru verbs like 心配する conjugate as an irregular verb, but 愛する is considered to be in the process of "godanization". For instance, the negative form is 愛さない and not 愛しない.
Yes, some single kanji stem -suru verbs have this tendency, just like 属する, 訳する, 対する, 期する,,,. But this change doesn't occur on ん or っ ending stem verbs.
e.g.
反する[はんする] --> 反しない
接する[せっする] --> 接しない
It's safe to choose compound kanji stem verbs as an example of -suru verbs.
Dude it's just a fact, perhaps one of the godfathers can give some etymology, but dictionary form plus な is the plain negative imperative. 食べるな(Don't eat.), 行くな(Don't go.), et cetera.
Dude it's just a fact, perhaps one of the godfathers can give some etymology, but dictionary form plus な is the plain negative imperative. 食べるな(Don't eat.), 行くな(Don't go.), et cetera.
it's maybe important to note that this negative command is emphatic, and would only be appropriate when speaking to someone at or below your level in the social hierarchy.
It would be more appropriate (along with several other choices) in ANY situation other than one where the speaker is CLEARLY in a socially superior situation AND doesn't have to give any thought to how the other person may not like being ordered around. It is a negative command form, plain and simple. If you find yourself using it, you have chosen to forego a number of more considerate options.