I'm writing to tell you about how we students use computers in our daily lives．为什么去掉要 about呢?

I'm writing to tell you about how we students use computers in our daily lives．为什么去掉要 about呢?
I'm writing to tell you about how we students use computers in our daily lives．
为什么去掉要 about呢?

I'm writing to tell you about how we students use computers in our daily lives．为什么去掉要 about呢?
tell sb sth 固定用法
you 是sb
how we students use computers in our daily lives 是sth,是宾语从句