The verb “Suru/Shimasu” is most of the time a transitive verb. Actually, sometimes “Suru/Shimasu” is used as an intransitive verb as introduced by the example sentence number 5 in the section 47. But let us just put aside “Suru/Shimasu” as an intransitive verb now. We are focusing on “Suru/Shimasu” as a transitive verb. Then, today’s sentences are to be compared with the exercise A4 in the section 19, in which the intransitive verb “Naru/Narimasu” is used.
(1) Sentence Constructions in A4 S19 with “Naru/Narimasu”
– [Subject] wa* [I-adj]+ku Narimashita.
– [Subject] wa* [Na-adj]+ni Narimashita.
– [Subject] wa* [Noun]+ni Narimashita.
(* “ga” is also used.)
(2) Today’s constructions of A4 S44
– [Object] o [I-adj]+ku Shimasu.
– [Object] o [Na-adj]+ni Shimasu.
– [Object] o [Noun]+ni Shimasu.
There is a difference between the sentences of (1) and (2), at the sentence ending. The sentences of (1) end with “-mashita.” which means perfect tense, in other words, actions of changing have already happened. On the other, the sentences of (2) end with “-masu” which means actions of changing will happen near future, or strong will of the subject. But rather than this difference of tense, there is an important difference between (1) and (2).
The sentences of (1) express that the subject itself changes. Therefore, the subject needs to be mentioned and the verb of changing must be the intransitive verb “Naru/Narimasu”.
The sentences of (2) express that the object is changed under someone’s intention. Therefore, the object needs to be mentioned and the verb must be a transitive verb, in this case, “Suru/Shimasu”.
Then, let us compare (1) and (2) with example sentences.
(1) [Subject] was {I-adj+ku / N-adj+ni / Noun+ni} Naru
1. Tenki wa Yoku Nari mashita. (The weather has become better.) — Yo+ku Naru
2. Machi wa Nigiyakani Nari mashita. (The town has become busy.) — Nigiyaka+ni Naru
3. Satou-san wa Daigakusei ni Nari mashita.
(Sato-san has become a university student.) — Daigakusei+ni Naru
The sentences 1 to 3 mean that the subject has got changing of its own to the current situation. The intransitive verb for change “Naru/Narimasu” is to express this kind of change.
(2) [Object] o {I-adj+ku/N-adj+ni/Noun+ni} Suru
4. Zubon no Suso o Mijikaku Shi masu. (I am going to shorten the hems of my trousers.)
5. Daidokoro o Kireini Shi masu. (I am going to clean the kitchen.)
6. Ofuro no Oyu o Yon-juu Ni doni Shi masu. (I will set the temperature of hot water 42 Celsius degree.)
where; Ofuro is a noun meaning a bath, Oyu is a noun meaning hot water.
Sentences 4 to 6 express that the subject, in this case “Watashi (I)”, intentionally bring a change onto an OBJECT that is marked by the particle “-o”. This is of course due to the function of the transitive verb “Suru/Shimasu”
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This post was written with reference to the exercise A4 of Section44 in “Minna no Nihongo (2nd Edition)” published by “3A Corporation”
































