in between
in between意为:在……之间。其作用仍相当于介词。如:
There are trees in between the buildings. 大楼之间有树。
It’s somewhere in between New York and Chicago. 它位于在纽约和芝加哥之间的某个地方。
有时可用作副词。如:
He has breakfast and supper and doesn’t eat anything in between. 他只吃早餐和晚餐,其间什么也不吃。
以上各用法中的介词 in 有时也可省略,而只用 between.