JLPT N1 Shinkanzen Grammar Lesson 1: ～が早いか・～や否や・～なり (As soon as... / Immediately after...)

Meaning: No sooner does A occur than B follows almost immediately.
✓ Emphasizes the extremely short interval between the two events.
✓ The latter clause normally describes an actual event or action that occurs immediately afterward.
✓ Note: The latter clause is not used for commands, requests, invitations, or the speaker’s volitional expressions.

Meaning: The event in the latter clause occurs almost simultaneously with the event in the former clause. The subjects of the two clauses may differ.
✓ Often used with verbs indicating a rapid change.
✓ The latter clause describes a fact or naturally occurring event; it cannot express the speaker’s volition or desire.

Meaning: Immediately after doing one action, the same person proceeds to another action.
✓ The latter action is volitional but somewhat unusual or unexpected, causing surprise to the observer.
✓ Note: The subject is normally a third person, and the subject of both clauses must be the same person.

Meaning: No sooner is A done than B happens again; the same kind of situation keeps recurring.
✓ Often used when a completed result is immediately undone or an undesirable situation recurs right away.
✓ Commonly carries a nuance of complaint, dissatisfaction, or frustration.

Meaning: Ever since an action or event occurred, a major change has taken place and the resulting new state has continued.
✓ Not used for something that happened only recently. The latter clause describes the changed state continuing over time.
✓ Strongly emphasizes the magnitude of the change, more than ordinary ～てから.

Meaning: Indicates that a person or thing is in a particular, often exceptional, circumstance, period, or situation.
✓ ～にあって: Means “in/under such circumstances,” followed by the relevant event or state.
✓ ～にあっても: Means “even in/under such circumstances”; the latter statement still holds, giving a concessive meaning.
✓ This is a formal, written expression.