Japanese Grammar Basics

- Is/Am/Are -

Is/Am/Are - The da Copula

Probably the most common grammar in the Japanese language. A Copula links a subject with another concept to describe it. In English this is done with a verb (to be) in the form of "is", "am", or "are".

In Japanese, the copula is expressed by following an idea with da, which links that idea with the subject (often an implied subject).

りんごringo da (it) is (an) apple(s)
がくせいgakusei da (I/we/they) am/are (a) student(s)
Note

Japanese doesn't have articles like 'the', 'a' or 'an'.

The subject (it/I/we/they) is left implied here. Japanese doesn't always require explicit subject markers like english does. It relies a lot more on context.

Apple and student can be singular or plural depending on context, there is no distinction in Japanese.

can also be dropped in very casual settings.


Copulasda/ですdesu Links a subject with another concept to describe it. Functions like "to be" to declare what something is.
Particles Markers placed after a word to define its grammatical role.
Topicwa The overarching context. Marked by wa (Pronounced wa). Establishes a new topic for consideration.
Subjectga The specific actor of the verb. Marked by ga. Identifies "who" or "what" specifically.
Objecto The target of an action. Marked by o (Pronounced o). Used with transitive verbs that act on the object.
Verb Action or state words that always appear at the end of a Japanese sentence.
Sentence Order (Topic/Subject/Object - Verb). Particles allow for flexible order, but the verb is usually at the end.
ru-verbsいちだんichidan Verbs usually ending in ~iru or ~eru that follow a consistent conjugation pattern by dropping ru.
u-verbsだんgodan The majority of verbs. They end in various "~u" sounds (く,ぐ,む,ぶ, etc.) and conjugate differently across five rows depending on the verb ending (hence go dan). Usually not ending in ~iru or ~eru.
i-adjective Adjectives ending in い that act like verbs and can conjugate similarly. They can act as their own copula when ending a sentence.
na-adjective Noun-like adjectives that require placing な at the end to modify a noun.
Irregular Verbskuruするsuru The only two truly irregular verbs in Japanese: "to come" and "to do". They conjugate irregularly, and need to be memorized.
Politenessですdesu/ますmasu Japanese uses multiple politeness levels depending on the social context. ですdesu/ますmasu is the standard polite level used with strangers and acquaintances, also known as ていねいteineigo.
ますmasu Stem The base form of a verb used to attach ますmasu and various other grammatical suffixes. Formed by removing the ru from ru-verbs, or changing u-verb's ~u endings to their ~i ending equivalents.