N55 patterns

N5 Grammar: Copula & Existence

Basic sentence structures with です/だ and existence verbs ある/いる

Practice N5 grammar All N5 Grammar

5 points

Every N5 copula & existence pattern

What each pattern means, when to use it, and the mistakes that cost marks in the exam.

でしたWas / Were (past copula)

Past tense polite form of the copula です. Used to state that something was or used to be something. The casual past form is だった. The negative past polite form is ではありませんでした.

Common mistakes

Using です (present) when talking about past states
Confusing でした with ました (past polite verb ending)
Using だった in polite contexts where でした is expected

Full でした guide

です / だTo be (copula)

Connects a subject to a predicate, stating identity or description. です is the polite form used in formal speech and writing; だ is the plain/casual form used among friends and in informal contexts.

Common mistakes

Using だ in polite contexts where です is expected
Adding です after い-adjectives in plain form (×楽しいだ)
Confusing です with ある/いる for expressing existence

Full です / だ guide

があるThere is / exists (inanimate)

Expresses the existence of non-living things (objects, events, concepts). The location is marked with に, and the thing that exists takes が. Polite form is があります. Negative: がない / がありません.

Common mistakes

Using がある for people or animals (use がいる instead)
Confusing the particle order: location に thing がある
Using は instead of が when introducing existence for the first time

Full がある guide

がいるThere is / exists (animate)

Expresses the existence of living things — people, animals, insects. The location is marked with に, and the living thing takes が. Polite form is がいます. Negative: がいない / がいません. The key distinction from がある is animate vs inanimate.

Common mistakes

Using がいる for inanimate objects (use がある instead)
Confusing に (location of existence) with で (location of action)
Using を instead of が to mark the thing that exists

Full がいる guide

じゃない / ではないTo not be (negative copula)

Negates the copula, denying identity or description. じゃない is casual, ではありません is the polite form, and じゃありません is semi-polite. Used to say something is not something else.

Common mistakes