不但

不但...而且...

búdàn...érqiě...

Not only...but also...

他不但聪明，而且努力

tā búdàn cōngming, érqiě nǔlì

He is not only intelligent, but also hardworking

这本书不但有意思，而且有用

zhè běn shū búdàn yǒu yìsi, érqiě yǒuyòng

This book is not only interesting, but also useful