4.3 Adjectives, Existence & Sentence Patterns

Adjectives, existence, and the sentence patterns that tie it all together

This section covers the last building blocks of N5 grammar: the two adjective types, the existence verbs, the copula, question words, and the fixed patterns that appear again and again in the reading and listening sections.

い-adjectives versus な-adjectives

Japanese has two adjective classes and they inflect differently. い-adjectives end in い and conjugate on their own, attaching directly to です. な-adjectives behave more like nouns: they need な to sit before a noun and they negate like the copula.

The pattern is systematic: い-adjectives drop the final い and add くない for the negative and かった for the past, while な-adjectives use the copula's じゃありません / でした. The single most important exception is いい ('good'): it secretly conjugates from the older stem よ-, so its negative is よくない, its past よかった, and its te-form よくて. Forms like いくない or いかった are always wrong, and the exam plants them as distractors. Also learn あまり ('not very'), which only works with a negative: 「あまり おもしろくないです」('not very interesting') is the natural, polite way to answer a quality question with いいえ.

あります versus います (existence)

Japanese has two verbs for 'there is / exists', chosen by whether the thing is alive. あります is for inanimate things and plants (「つくえの うえに ほんが あります」, 'There is a book on the desk'); います is for people and animals (「へやに ねこが います」, 'There is a cat in the room'). Both mark the existing thing with が and mark the location with に. The copula だ/です ('is/am/are') links a noun to a description: 「これは かさです」('This is an umbrella'); its plain form is だ, its polite negative ではありません / じゃありません, and its past でした.

Question words and useful patterns

Question words slot into normal sentence positions and the sentence ends in か: なに/なん ('what'), だれ ('who'), いつ ('when'), どこ ('where'), どう ('how'), どうして ('why'), いくら ('how much [price]'), いくつ ('how many'). High-frequency N5 patterns include:

• 〜たいです — 'want to do'; attach たい to the ます-stem: 「にほんに いきたいです」('I want to go to Japan').
• 〜がすきです — 'like'; the liked thing takes が: 「おんがくが すきです」('I like music').
• 〜ましょう / 〜ましょうか — 'let's / shall we': 「いっしょに いきましょう」('Let's go together').
• 〜ませんか — a soft invitation, 'won't you…?': 「コーヒーを のみませんか」('Would you like to drink coffee?').
• Comparison A は B より… — 'A is more … than B': 「この ほんは あの ほんより たかいです」('This book is more expensive than that book'); the fuller form 「A と B と どちらが …ですか」asks 'Which is more …?', answered with 「A の ほうが …です」.

な-adjectives that look like い-adjectives

A reliable trap is the handful of な-adjectives whose dictionary form happens to end in the sound い. きれい ('pretty/clean') and ゆうめい ('famous') both end in い, but they are な-adjectives: you say きれいな はな ('a pretty flower'), not きれい はな, and the negative is きれいじゃありません, never きれくない. Because the exam knows learners over-apply the い-adjective rules, it deliberately offers くない negatives for these words as distractors. Memorise きれい and ゆうめい as な-adjectives and you will sidestep one of the most common N5 grammar mistakes.

Comparisons and question-word patterns in depth

The comparison frame has two halves worth drilling. To state a comparison you use A は B より, where より marks the standard: the thing after より is what A is measured against. To ask which of two options is greater you use A と B と どちらが …ですか, and the answer selects one with A の ほうが …です. So 「コーヒーと おちゃと どちらが すきですか」('Which do you prefer, coffee or tea?') is naturally answered 「コーヒーの ほうが すきです」('I prefer coffee'). Question words interact with these patterns: どちら asks 'which of two', どれ asks 'which of three or more', and どの needs a following noun (どの ほん, 'which book'). Keeping どちら, どれ and どの straight is itself a recurring grammar item.

Common mistakes with existence and the copula

Two further traps round out the section. First, do not use です where an existence verb is required: 「つくえの うえに ほんです」is wrong, because existence needs あります, giving 「ほんが あります」. です links a noun to a description, while あります/います assert that something is located somewhere. Second, remember the copula's negative is ではありません or じゃありません, never くない, which belongs only to い-adjectives. Sorting the copula, the existence verbs, and the two adjective classes into their correct slots is the last piece of the N5 grammar puzzle.

〜たい, 〜ませんか and 〜ましょう nuances

These three patterns are easy to confuse. 〜たいです states your own desire ('I want to…') and cannot politely describe a third person's wish. 〜ませんか is an invitation that leaves the choice to the listener ('won't you…?'), while 〜ましょう proposes a shared action you assume the listener already agrees to ('let's…'). On the exam the reply usually reveals which is wanted: an invitation earns ええ、いいですね ('yes, that sounds good'), whereas a proposal earns a simple はい、そうしましょう ('yes, let us do that'). Matching the ending to the response is a favourite text-flow (文章の文法) task.

Worked 文の組み立て (sentence-ordering) example

The second grammar question type gives four scrambled pieces and one starred ★ slot; you rebuild the sentence and report which piece lands on the star. Suppose the sentence is 「わたしは ＿ ＿ ★ ＿ たべたいです」and the pieces are ① レストラン ② で ③ ばんごはん ④ を. Working it out: the place of the action takes で, so レストランで; the object ばんごはん takes を, giving ばんごはんを; the verb たべたいです ('want to eat') needs an object. The grammatical order is わたしは レストランで ばんごはんを たべたいです ('I want to eat dinner at the restaurant'). Mapping the pieces onto the four slots — レストラン / で / ばんごはん / を — the ★ (third slot) is ばんごはん (③). The trick is to build the sentence first, then read off the starred word; never try to guess the star directly. Combine the copula, both adjective types, the existence split, and these patterns, and you can handle every grammar question type the N5 throws at you.

As a final routine, practise the three grammar formats in the order the test presents them: first the particle-and-ending fill-in (文法形式の判断), then the star-slot reordering (文の組み立て), then the passage cloze (文章の文法). The skills stack — a firm grasp of particles and adjective forms makes the reordering questions almost mechanical, and the same knowledge lets you pick the connective that keeps a short passage flowing naturally.