～出す
Suddenly begin doing something
You'll be able to show that an action starts suddenly, often in a noticeable or unexpected way.
赤ちゃんが急に泣き出しました。
akachan ga kyuu ni nakidashimashita.
What do you think this sentence means?
The baby suddenly started crying.
Notice a sudden beginning
～出す often presents an action as suddenly breaking out. It is natural for rain, laughter, or crying that starts unexpectedly.
芽衣が笑い出しました。
mei ga waraidashimashita.
Mei burst out laughing.
Form and use ～出す
Remove ます and add 出す, which conjugates as a Group 1 verb: 出します, 出した. For a neutral planned start, 始める is usually more suitable.
芽衣が笑い出しました。
mei ga waraidashimashita.
Mei burst out laughing.
犬が走り出しました。
inu ga hashiridashimashita.
The dog suddenly started running.
静かだった犬が、急に鳴き出しました。
shizuka datta inu ga, kyuu ni nakidashimashita.
The dog had been quiet, but it suddenly started barking.
先生の話を聞いて、学生たちはみんな笑い出しました。
sensei no hanashi o kiite, gakuseitachi wa minna waraidashimashita.
When they heard what the teacher said, all the students burst out laughing.
バスが急に動き出しました。
basu ga kyuu ni ugokidashimashita.
The bus suddenly started moving.
7 more examples in the grammar path — free for a limited time.