get ready for sth./to do sth.
get ready for sth.意為“為某事做準備”get ready to do sth.意為“準備做某事”
例如:
get ready for something difficult or unpleasant.為某些不愉快或困難的事情而作好準備
We are getting ready for the meeting. 我們正在為會議做準備。
They were getting ready to have a sports meet at that moment. 他們那時正準備開運動會。
prepare sth for sb= get sth ready for sb
Ready 最常用的是做形容詞,少數情況下也做動詞、副詞和名詞。
形容詞:( 比較級和最高級, readier, readiest)
prepared, 準備好了的(不用在名詞前面,僅做表語) 
We can't eat now – dinner is not ready. I will be ready in five minutes. Are you ready to go to school?