inquire, acquire, achieve, require 的区别和用法辨析及示例例句

inquire: 打听,询问。如:inquire a person’s name(问一个人的姓名)
acquire: 取得,获得,学到。如:acquire knowledge (获得知识)
achieve: (成功地)完成,实现。如:He will never achieve anything unless he works harder. (如他不努力工作,将会一事无成。)
require: 需要。如:We require more help. (我们需要更多的帮助。)