All phrases

Over a period of time

Expressing a feeling of surprise and dismay.

Greeting used in the afternoon.

Goodbye, informal.

Quickly.

Showing empathy for the other person's feelings.

A considerable amount of time

Expressing disbelief or doubt.

Greeting used in the evening.

Formal farewell.

Learn to do it.

Redirecting the conversation towards problem-solving.

A brief period

Expressing great surprise and admiration.

Polite inquiry about someone's well-being.

Informal goodbye.

Beginning of a story.

Asking about someone's availability.

Showing that the other person's perspective is important.

The week following this one

Expressing disbelief and wonder.

Response to 'How are you?'

Greeting.

Gradually.