Usage patterns
〈事〉だけでなく〈事〉もnot only ~ but also ~
He can speak not only English but also Chinese.
〈動詞〉だけあってprecisely because ~; as one would expect from ~
As one would expect since she studied abroad, her English is good.
好きなだけ〈動詞〉as much as one likes
You can eat as much as you like.
できるだけ〈動詞〉as much as possible
Please come as soon as possible.