Cách sử dụng
The expression "God/goodness/Heaven knows" is used when you are unsure about something or when you want to say that you do not have any information about a certain thing. For example, if someone asks you where their missing keys are, you can say "God knows" to mean that you have no idea where their keys might be. Similarly, you can use the expression if you are trying to explain something and you are not sure of the details, you can say "goodness knows" to indicate that you don't know for sure. It's a way of expressing uncertainty or lack of knowledge about a topic.