talk 是不及物动词,只有加上必要的介词才可以跟宾语,如 talk to（对着某人跟他谈话）,talk with（与某人一起交谈）,talk over（ 讨论某事/ 说服某人）
宾语有两种：一种是动词的直接宾语,如：talk to someone；另一种称作逻辑宾语,如 someone to talk to【不定式 to talk to 是后置定语,soneone 是逻辑宾语,如果没有介词 to ,someone 就不能成为谈话的对象】.
另如：
He is writing with a pen. 【直接宾语】（他正用一支笔写字）
He uses his forefinger to write with. 【逻辑宾语】（他用食指写字）
They have arrived to the city. 【直接宾语】（他们已经到达这个城市）
They are leaving that city to have arrived at only the other day.【逻辑宾语】（他们准备离开这个前几天才来到的城市）