Definition
Used to express disapproval or annoyance about something that has happened or been done.
（表示不赞同）竟然做了…，居然做出…
She's gone and told everyone my secret, which is completely out of line.
她竟然把我的秘密告诉了所有人，这真是太过分了。
They've gone and used my tools without asking, which is really disappointing.
他们居然没问我就用了我的工具，这真让人失望。
He’s gone and spilled coffee all over my new shirt, how awful!
他竟然把咖啡洒在我的新衬衫上，太糟糕了！