To give advice to someone we can use the expression 方houがいいです, meaning had better or should do.

方houがいいです is used at the end of the sentence, and it follows different tenses depending on whether the advice is in the affirmative or negative, i.e. had better or had better not.

When giving advice in the affirmative, 方houがいい follows a verb in the plain past tense.

It's also possible to use the present tense instead of the past tense before 方houがいいです, This sounds stronger and more direct.

For advice in the negative, use the verb in the plain present tense, never in the past tense.

方houがいいです can also be written in hiragana rather than kanji as ほうがいいです, and in informal situations you can omit the final です.

Breakdown of sorosoro zikan desu. itta hou ga ii desu.