As soon as

As soon as she heard the news, she started crying.

As soon as he arrived at the station, he called his family.

The moment

The moment she saw him, she recognized him.

The moment the lights went out, the party started.

Immediately

Immediately after the meeting, we went to lunch.

Immediately he finished his homework, he started playing video games.

Right away

Right away, I will send you the file.

Right away, he went to help the person in need.

No sooner...than

No sooner had they arrived at the airport than they were greeted by the fans.

No sooner had she finished her homework than she went out to play.

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