英语亲力亲为

byonself, of oneself, for oneself, to oneself“介词+反身代词”词组在阅读中经常碰到，由于理解不够准确，常常造成阅读理解的障碍，因此，有必要加以举例说明。1. by oneself"单独地，独自地'' 1) They made the model machines all by themselves. 2) You can complete the task by yourself.2. of oneself''自行地'' 1) The fire died of itself. 2) The baby woke up of himself all of a sudden.3. for oneself''亲自，为自己'' 1) Do you have anying to say for yourself? 2) One cannot do such a thing for oneself.4.to oneself含有“暗自（在心中）的意思 ，常与动词 think,say, talk,tell等连用。 1) The boy said to himself."I must study hard.'' 2) This dictionary is used to himself. 根据以上例句，我们可以看出：by oneself主要含义为''独自，自个儿、亲自''，没有别人帮助，相当于alone; of oneself是指不受外界事物干涉而自行完成的动作，常用在不及物动词之后；for oneself一般表示“为自己”的意思；to oneself则强度调“供某人独自用”和“暗自”的含义 。

Do It Myself类似于Do It Yourself (DIY)意思独立完成，无须别人协助,解释为 我自己做。表示自己独立完成的意思，应该有by oneself,alone,on one's own这里为了言简意赅，将by myself 里的by省略了。

他凡事都喜欢自己亲力亲为He is keen to do everything by himself.

by oneself 单独地，强调独自=alone。靠自己，无他人帮助=without help。for oneself 为自己；独自地；为了自己；亲自：强调亲力亲为，不要他人代替。

for u self意思是自便请问自己考虑。

for oneself除了解释为为了自己，也有亲自，独立地的意思。One cannot do such a thing for oneself.这样的事情独自一个人是做不起来的。 from《新英汉词典》结合常用词组来进一步理解：see for oneself 亲眼看by oneself侧重于自己独立做某事

Do It Myself类似于Do It Yourself (DIY)，就是自个动手、独立完成的意思