那是个正规的宴会,我照妈妈对我讲的那样穿着礼服去了。That was a formal party, I went to the party wearing the dress as mom told me.
That was a formal banquet, so I dressed myself up as my mother told me.
That was a formal party, I dressed to T according to what my mom told me.
As it was a formal dinner party ,I wore formal dress ,as mother told me to.