According to the latest figures, the majority of the world's population is now bilingual or multilingual, having grown up speaking two or more languages. 请问句中为什么要用完成时?是为了表示成长这个动作被重复很多次吗?为什么不用growing up?谢谢解惑
例句:1. Learning that you're returning to your hometown, I'm writing to express my gratitude to you for your help.2....O'Connor said in 2017, adding that personnel exchanges and educational cooperation between the two countries are growing well.