Cách sử dụng
The expression "up to no good" is used when we suspect that someone is doing something wrong or mischievous, usually without any good intentions. It can be used in different situations, like when we see a group of kids gathering in a corner or when we notice someone behaving suspiciously. It's important to note that this expression is generally used in a playful or joking manner, so it's not a serious accusation. For example, if a friend is behaving playfully, we can say "I think you are up to no good" to tease them. Overall, it's a fun expression that can be used to add a bit of humor to everyday conversations.