Cách sử dụng
"But then" is an expression that people use when they want to show a sudden change in a situation or a story. For example, "I was feeling tired, but then I had some coffee and felt more awake." Or "I was walking to the store, but then it started raining so I had to go back home." In both of these examples, something unexpected happens that changes the situation. You can use "but then" in any situation where there is a sudden change or unexpected event.