“Dekiru/Dekimasu” is the potential form of the verb “Suru/Shimasu”. You will see some explanations about the verb “Suru/Shimasu” in the section 44 (probably). At this time, let us look at these two verbs, Suru and Dekiru in the following three steps;
(1) Suru is most of the time used as a transitive verb, although it is occasionally used as an intransitive verb.
(2) Dekiru is the potential form of Suru, but it tends to work as an intransitive verb, because it takes a form of “[Subject] ga Dekiru.”
(3) Dekiru can be used as an intransitive verb with much less concept of “Potential form of Suru.”
“Dekiru” in today’s sentences are the type of (3). It means that something comes out and is completed.
1. Atarashii Buru ga Dekimashita. (A new building is completed.)
2. Shudai ga Dekimashita. (My homework has been done.)
Both the sentence1 and 2 are intransitive verb sentences. Instead of being a potential form of transitive verb, these “Dekimasu”s are completely intransitive verbs.
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This post was written with reference to the exercise A4 on Section27 of “Minna no Nihongo (2nd Edition)” published by “3A Corporation”
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