第一句并无语法错误，myself为"我亲自要去"，而by myself为"独自一...，myself,want,单词记忆法、语法用法，与myself,want, 相关例句、名人名言

myself单词相关例句：

I myself have become a Gaullist only little by little. 我自己也只是一点一点地才成为一个戴高乐主义者的。
I count myself in nothing else so happy as in a soul remem-bering my good friends. 我认为，只有在脑海中想起好朋友时我才会那样快乐。
I love myself well, but my countrymen better. 我爱自己，但更爱自己的同胞。"

—I cut myself and I need someone to help me. Do you know first aid? —Yes.
我割到了自己，我需要有人来帮我，你会急救吗？是的，我会。


I look at myself in the mirror before work.
上班前我照了照镜子。

I remember the first time that I really looked you in your eyes I was thinking to myself there will never be anybody else.

我记得我第一次真正地注视你的双眼时,我就在想,绝不会再有第二人了。

I've been long-distance running a lot to get myself into shape.

我坚持长跑锻炼身体。

I have to wean myself from watching TV every night.

我得改掉每天晚上看电视的习惯。

I want to improve myself in English.

我想提高自己的英语水平。

I am teaching myself English.

我在自学英语。

want单词相关例句：

I want to bring out the secrets of nature and apply them for the happiness of man . I don't know of any better service to offer for the short time we are in the world .(Thomas Edison , American inventor)  我想揭示大自然的秘密，用来造福人类。我认为，在我们的短暂一生中，最好的贡献莫过于此了。 (美国发明家 爱迪生. T.)
Poverty is an abnormality to rich people. It is very difficult to make out why people who want dinner do not ring the bell.——Walter Bagehot, Buetish economist  对于富人来说，贫穷是不可理解的异常现象：他们怎么也弄不明白，那些想要吃饭的人，为什么不摇铃让人送来呢？英国经济学家巴杰特.W.  
Brave actions never want a trumpet. 勇敢的行为不须要吹号。
For age and want save while you may; no morning sun lasts a whole day. 为了年老和急须，要及时积蓄，因为早晨的太阳，不会整天照耀。
If you want a pretence to whip a dog, say that he ate the frying-pam. 欲加之罪，何患无辞。
If you want a thing (well) done, do it yourself. 要想做好事情，就要自己动手。
If you want knwledge, you must toil for it. 若要求知识，必须刻苦学习。
Money is often lost for want of money. 往往由于缺乏金钱而丧失金钱。
If you want your children to keep their feet on the ground, put some responsibility on their shouldres.——Joh Brnyan Btitish ssayist 你若希望你的孩子总是脚踏实地， 就要让他们负些责任。英国散文家 班扬，J.
Good times, bad times, there will always be advertising, In good times people want advertising; in bad times  they have to.Bruce Barton  British  economist管是繁荣时期还是萧条时期，广告总会存在。繁荣时，人们想做广告；萧条时，人们不得不做广告。英国经济学家  巴顿  B.