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1·In 1989, Tim Berners Lee invented the World Wide Web all by himself.

1989年，蒂姆·伯纳斯·李发明了万维网，这完全是他自己发明的。

2·He was doing it all by himself.

全都是他独自一个人干的。《柯林斯英汉双解大词典》

3·He lives all by himself.

他独自一人生活。《牛津词典》

4·Xu has learned English all by himself.

徐是自学英语的。

5·Nobody taught my grandpa how to use WeChat, so he learned it all by himself.

没有人教过我的祖父怎样使用微信，所以他全靠自学。

6·He did extra chores for his parents and raised $70 all by himself.

他为父母做额外的家务，独自筹集了70美元。

7·Maybe there is no music, so it's just kind of dancing in the middle of a cookie sheet all by himself.

也许根本没有音乐，所以这就像是他自己在烤盘中间跳舞。

8·He did it all by himself!

他独自一人做了这件事。

9·Now he's going to America all by himself.

现在，他自己一个人要到美国去了。

10·He became an oil baron-all by himself.

他白手起家，成为一名石油大王。