关于介词of,for,with,to,on,in,by,about,at的用法。答:for 为..., 因为..., 至于... 。 He works for this company. 他为这家公司工作。 She came back to the classroom for she had left her books in the classroom. 她返回到教室是因为把书留在了那里。 from 从..., 来自..., 因为...。 Where are you from? 你是哪里人? He died from an ...