Giving Advice in Japanese: Hou ga Ii & Nakereba Naranai

Moving on from direct commands, let's learn some softer, but still powerful, ways to guide actions. This lesson covers how to give advice ("it would be better if you...") and how to express obligation or necessity ("you have to...").

Giving Advice: 〜ほうがいい (hō ga ii)

This pattern is used to give advice, essentially meaning "it would be better if you do X." It's used for specific situations and can sound quite strong, so it's best used when you genuinely want to help someone.

Affirmative Advice ("You should...")

For positive advice, you use the past tense た-form of the verb.

Negative Advice ("You shouldn't...")

For negative advice, you use the ない-form of the verb.

Expressing Obligation ("Must" / "Have to")

There are several ways to say you "must" do something in Japanese. They are all based on a negative structure, like saying "If you don't do X, it is not good." Here are the two most common polite forms.

Pattern 1: 〜なければなりません (nakereba narimasen)

This is a standard, slightly formal way to express obligation. To make it, take the ない-form, drop the final い, and add ければなりません.

Pattern 2: 〜ないといけません (nai to ikemasen)

This is also very common and often interchangeable with the pattern above. Simply add といけません to the ない-form.