1. 作动词或介词的宾语：经常在enjoy, teach, hurt, buy, introduce, seat, dress, express, amuse, behave等动词和by, for, to, of等介词后作宾语。如：

He is teaching herself English.她在自学英语。

She was talking to herself.她自言自语。

He lives by himself in the country.他独自住在乡下。

2. 作主语或宾语的同位语：主要起加强语气的作用，译作“亲自，本身，本人”。如：

Did you make the cake yourself?这蛋糕是你亲自做的吗?(yourself作主语you的同位语)

The work itself is easy.这工作本身很容易。(itself作主语the work的同位语)

Did you see Mr. Wang himself?你见过王先生本人吗？(himself作宾语Mr. Wang的同位语)

3. 作表语：在be, feel, look, seem等系动词后作表语，表示身体或精神状态处于正常。如：

I’m not myself today.今天我感觉不舒服。

I am feeling myself again.我觉得健康如昔。

4. 用于一些简短的会话用语或固定说法中。如：

Help yourself! 请随便吃吧！/请自己去取吧!

Make yourself at home! 别客气！

Don’t upset yourself! 别自寻烦恼！

Make yourself heard /understood. 使你的话被人听得见/理解。