What does "step in" mean?

To intervene or take over temporarily To fill in or help when needed.

How do you use "step in" in a sentence?

She stepped in when he was ill. Someone needs to step in. The deputy stepped in as chair.

Phrasal Verb BritishAmericanAustralian ★★★★★ Very Common Neutral

Meaning: To intervene or take over temporarily

介入、临时顶替

Intervenir, sustituir temporalmente

介入する、代わりに務める

개입하다, 대신하다

To fill in or help when needed.

在需要时补位或提供帮助。

Ocupar el lugar de alguien o ayudar cuando se necesita.

必要な時に代役を務めたり、助けたりすること。

필요할 때 대신하거나 도와주다.

Base verb: step

Particle: in

Separable: No — the verb and particle stay together

She stepped in when he was ill.
他生病时她顶上了
Ella le sustituyó cuando estuvo enfermo
彼が病気の時、彼女が代わりを務めた
그가 아팠을 때 그녀가 대신 맡았다.
Someone needs to step in.
需要有人出面
Alguien tiene que intervenir
誰かが介入する必要がある
누군가가 나서야 한다.
The deputy stepped in as chair.
副手临时担任了主席
El adjunto asumió temporalmente la presidencia
副議長が議長代理を務めた
부의장이 의장 대리를 맡았다.

Context: intervening, temporary, helping

Tone: helpful

From stepping into a role.

Era: Modern

Generation: All ages

Social background: Universal