No sooner… than…
conjunction
As soon as; indicates that a second event happened immediately after the first one.
No sooner had I arrived at the station than the train came.

Often appears as...
- no sooner had...
- no sooner was...
conjunction
As soon as; indicates that a second event happened immediately after the first one.
No sooner had I arrived at the station than the train came.

Often appears as...
- no sooner had...
- no sooner was...
Definition 1 of 1

Sequential Actions
Use when describing two actions that happened in sequence, almost simultaneously.

No sooner had she finished her speech than applause filled the room.
Past Perfect
The first action often uses past perfect tense to emphasize its completion before the second.

No sooner had the sun set than the stars appeared.
Immediate Response
Indicates an immediate reaction or consequence to an event.

No sooner had the lights gone off than her phone rang.
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