Lists a non-exhaustive set of representative actions or states, implying there are others too ('do things like X and Y'). Also commonly used for alternating or repeated back-and-forth states.
[Verb た-form] り + [Verb た-form] り + する
週末は映画を見たり、本を読んだりします。
Shuumatsu wa eiga wo mitari, hon wo yondari shimasu.
On weekends I do things like watch movies and read books.
見たり + 読んだり + します = representative activities
彼女は笑ったり泣いたりした。
Kanojo wa warattari naitari shita.
She kept laughing and crying (by turns).
alternating states: laughing, then crying
窓を開けたり閉めたりしないでください。
Mado wo aketari shimetari shinaide kudasai.
Please don't keep opening and closing the window.
alternating, repeated actions
• たり〜たりする vs て〜て: たり〜たり implies non-exhaustive examples ('among other things'); て〜て gives a fixed sequence or a complete connected list. • Single たり: 家で本を読んだりする = 'I do things like read at home (and such),' casual, implying more. • The final する carries tense and politeness (します / した / しません).
The JLPT rarely asks whether you recognise a pattern — it asks which of several similar patterns fits. These are the ones 〜たり〜たり is tested against.
て〜て lists actions in a set order or as an exhaustive chain. たり〜たり lists them as just SOME examples, in no strict order, implying other unstated activities.
し stacks REASONS supporting a conclusion. たり〜たり lists representative ACTIONS/activities, not reasons.
Study Japanese grammar on LenGaki

Get the Android app
The app adds offline study, home-screen widgets, stroke-order tracing, speaking practice with pronunciation scoring, and an AI tutor that answers questions in context — none of which fits in a browser tab.