反身代词后面可以加动词，也可以不加任何词放在句尾。例如，She can cook dinner by herself.她可以自己做晚餐。
She herself makes breakfast every day.她每天自己制作早餐。这一句话中的herself是she的同位语。
Can you play the guitar by yourself?
反身代词，后面不加任何词性，反身代词一般结尾。如，No one told him，He learned it by himself，没有人告诉他，他自学的