是用来修饰全句的词,既不是单纯修饰一个形容词或动词.
修饰全句的副词置于句中或句末时必须用逗点隔开,如无逗点隔开易被认为是修饰动词,而放在句首时则逗点可有可无.
She,apparently,wants to say something.
她显然想要说点什么.
He escaped being killed in the car accident,fortunately.
很幸运他没在车祸中丧命.