HE IS DOOMED TO FAILURE IS OF NO DOUBT是什么语法

HE IS DOOMED TO FAILURE IS OF NO DOUBT是什么语法?
你写的这个是一个句子,一个有错误的句子,不是什么语法.
你想问的是:这个句子有什么误法错误吧?
主要错误在于：一个句子出现两个谓语动词：is doomed to ...及is of no doubt .
应在前一个句子加上一个that使之成为一个名词性从句,作is of no doubt的主语.（主语从句.） 改过来就是：
That he is doomed to failure is of no doubt.
他注定会失败,这是无用置疑的.
作主语的从句太长,常用it这个形式主语来代替它,而将这个真正的主语（从句）后置：
It is of no doubt that he is doomed to failure.
另：be of +抽象名词=be +adj.
如：It is of no use.= It is not useful.
至于sb.is doomed to 后加动词原形还是名词,要看情况：
查牛津双解,这两种情况都有：

1 a.注定[…][to]
ed to oblivion
注定被遗忘
The plan was ed to failure.
该计画注定失败
b.注定…
He was ed to die on the battlefield.
他注定要死于战场
2 对判 [刑] [to]
The prisoner was ed to death.
那名囚犯被判死刑
还有：Oxford Collocations dictionary for students of English
PREP.to
The species was doomed to extinction.
PHRASES doomed to disappointment/extinction/failure
The project was doomed to failure from the start.
还有：
Are whales doomed to extinction?鲸鱼是否注定要绝种?
We loathe each other,yet we seem doomed constantly to meet.我们相互厌恶,但似乎偏偏冤家常碰头.
还真不好说.
感觉用to fail更好些：（注定要失败）.或to为介词,用 to a failure.表示“他注定是一个失败者”.