begin: is the most general and applies especially to less formal contexts: school ~s at eight; ~ to wash the dishes.


commence: suggests greater formality: let the games ~.


start: suggests a getting or setting into motion: the procession ~ed out slowly.


initiate: suggests the taking of a first step of a process or series: ~d the custom of annual gift giving.


inaugurate: implies a ceremonial beginning: the discovery of penicillin ~d a new medical age.


begin开始: 最通用，特别适用于非正式场合，commence开始: 更正式，start开始: 开始行动（即动作，主语或宾语是动作不是事物）或使开始行动，initiate发起: 表示迈出一个过程或系列的第一步，inaugurate开创开幕就职启用: 有仪式典礼感觉的开始。


记忆方法: 1）首字母BCSII重组成BISIC，想成basic初级的<==从初级开始first things first.


        2）开始的意思是路程过程操作的第一步mean to take the first step in a course, process, or operation.