Often,friequently,constantly,regularly 的用法区别？

Often,friequently,constantly,regularly 的用法区别？

1.often 经常，常常e.g. It very ~ snows there. = It snows there very ~. 那里常下雪2.frequently 频繁发生地e.g. Earthquakes occur ~ in Japan. 日本常发生地震3.constantly 不断地e.g. The affairs of state are ~ on the Prime Minister's mind. 首相时常挂念著国事4.regularly 有规则 [规律] 地; 定期地e.g. pay one's rent ~ 定期地付房租词汇例子出处：21世纪英汉汉英双向词典。