If one wants knowledge of a skill, one must take part in it oneself.
He went there himself the day before yesterday.
1) (all) by oneself 单独地
When I was young, I had to make a living all by myself.
Would you go there by yourself?
2) to oneself 独自享用
When he eats in a restaurant, he likes a table to himself.
3) for oneself 为自己；独自
One shouldn’t live for himself alone.
You must find it out for yourself.
4) of oneself 自动地
The door opened of itself.
5) between ourselves 私下里
Just between ourselves, I don’t think much of him.
6) in oneself 本身
The materials in themselves were not poisonous.
7) beside oneself 喜怒时发狂
She was beside herself with joy.
8) by itself 自然地
The machine will start by itself in a few seconds.
1) be not oneself 身体不好
I’m not quite myself today.(I’m unwell.)
2) enjoy oneself 玩得很痛快
3) help oneself to sth. 随便吃
Please help yourself to some fish.
4) teach oneself sth.自学
When he was young, he taught himself advanced mathematics.
5) accustom oneself to 习惯于
He quickly accustomed himself to this new way of life.
6) devote oneself to 致力于
I am determined to devote myself to the cause of education.
7) adapt oneself to 适应
She quickly adapted herself to the new climate.
8) adjust oneself to 调整；适应
The body quickly adjusts itself to changes in temperature.
9) behave oneself 举止得体
Please behave yourselves.
10) dress oneself 穿衣服
He is too young to dress himself.
11) seat oneself 就坐
He seated himself in the chair and began to read the novel.
12) make oneself heard / understood / seen / known / believed 让自己被（别人）听见/听懂/看见/认识/相信
He raised his voice to make himself heard by all.
13) find oneself 无意识中发现自己
At last, we found ourselves in a pleasant park with trees providing shade and sat down to eat our picnic lunch.
14) express oneself 清楚表达自己的意思
He is still unable to express himself in English.
15) talk to oneself 自言自语
16) come to oneself 苏醒