Grammar Info
N3 Lesson 9: 19/22

でもある
be also, it also is

Structure
Casual
Formal
Noun + ある
[な]Adjective + ある
Noun + あります
[な]Adjective + あります
Details
Register Standard
使用域 一般
Information
As an extension of the formal version of the 助動詞(じょどうし) (auxiliary verb) だ, である, でもある simply conveys that something ‘is also (B)’. However, as も often shows something that is surprising or unexpected, でもある will primarily be used to describe additional facts about (A) that may be unexpected. Due to this, でもある usually fills the (B) role in sentences like ‘while (A), it is also (B)’, or ‘in spite of (A), it is also (B)’.
でもある may be used after nouns, or な-Adjectives.
  • タナカさんは英語(えいご)先生(せんせい)し、休(やす)み日(ひ)は船(ふね)船長(せんちょう)でもあるから休(やす)む時間(じかん)ない
    While Tanaka-san is an English teacher, he is also the captain of a ship on his days off.
  • これは洗濯機(せんたっき)でもあるけど、同時(どうじ)に乾燥機(かんそうき)でもある
    In spite of this being a washing machine, it is also a dryer.
  • バンジージャンプは楽(たの)しいけれども、同時(どうじ)には危険(きけん)でもある
    In spite of bungee jumping being fun, it is also dangerous at times.
  • この機械(きかい)は重(おも)くて邪魔(じゃま)だけど、同時(どうじ)に便利(べんり)でもある
    While this machine is heavy and a nuisance, it is also useful.
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語学(ごがく)を学(まな)ぶことは楽(たの)しい。しかし、自分(じぶん)との戦(たたか)いでもある
Learning languages is fun. However, it is also a fight with oneself.
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この車(くるま)少(すこ)し狭(せま)いけれども、快適(かいてき)でもある
This car is a bit small, but it is also comfortable.
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オーストラリア国(くに)であり、大陸(たいりく)でもある
Australia is a country. It is also a continent.
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