That event greatly changed his life.

The statute of limitations has already expired for that case.

He has already left the house.

He has already gone home.

The Tiananmen Square incident is an important event in Chinese history.

The Marco Polo Bridge Incident was the trigger for the Sino-Japanese War.

He got involved in a love affair.

This is the most difficult case I have ever faced.

The Jinan incident of 1928 was an important event in Chinese history.

He quoted the proverb 'Once a word leaves your mouth, you cannot chase it back even with the swiftest horse' to teach me to choose my words carefully.