often和usually frequently 区分

often和usually frequently 区分 often,alway.frequently,usually的区别? frequently 、 usually 、 often 、 accustomed各词之间有什么区别和联系?不要翻译那些 often / usually / frequently / consistently.表示频率时候都一样吗? usually\often\sometimes 怎么区分 区分often usually sometimes什么时候用什么 always, often, usually 该如何区分? usual 和usually怎么区分 often和usually的区别 usually和often有什么区别吗 usually和often有什么不同? often和usually有什么区别、