依一句英文句字入面包含左咩文法?

What he has done 這子句全句用作名詞。譬如 The boy has attracted...，這句中 the boy 是整句的 subject，同樣 What he has done （他所做的事）也是你的那句的 subject。

有時名詞可以是一個字，但比較複雜的可以是一個子句 (clause) 或片語 (phrase)，整個子句當作一個名詞來用。所以兩個 has 各自在不同的句子裡。

"What he has done has attracted appreciative comments" is a statement, not a question.
Sentence pattern: subject + verb + object
What he has done - Subject. (noun clause)
has attracted - Verb (present perfect )
appreciative comments - Object (noun phrase)

2013-11-03 09:05:21 補充：
There are four sentence types:~ a statement, a question, an imperative and an exclamation.
Since it is a statement, there is no question mark at the end of the sentence. A full stop (period) is used instead..

"What he has done has attracted appreciative comments" is not a question.
"What he has done has attracted appreciative comments." is a sentence. Its structure is like "A has attracted B." in which A=what he has done, and B = appreciative comments.

The correct sentence should be:
What had he done to attract appreciative comments?
It's the past perfect tense in a questionable form.

2013-10-30 03:25:43 補充：
Since you are asking a question, the word "had" should come before the person "he."

「省略連接詞」、「過去」、「被動式」
Everything LAMLAM said was nonsense.

2013-10-30 01:17:33 補充：
'In 2003 Dr.Tse Yuen Ying tried to save a lot of SARS patients,has attracted appreciative comments.' - a run-on sentence by TOMINGBB.

The sentence should be
That Dr.Tse Yuen Ying tried to save a lot of SARS patients has attracted appreciative comments.

(1)What he has done----->subject,Noun clause as a clause;contains a finite verb, part of a sentence; independent of the main clause; called a coordinate clause.

(2)has attracted appreciative comments------->a main clause; in present perfect tense ; appreciative=expressive, recognitive.adj.
eg:-In 2003 Dr.Tse Yuen Ying tried to save a lot of SARS patients,has attracted appreciative comments.
Each of the "has" as an auxiliary verb appears in different clauses in the part of a sentence.

What he has done has attracted appreciative comments?

是指

(The thing that he has done) has attracted appreciative comments?

What he has done that he has attracted appreciative comments?

這句字只是省略連接詞,兩個都是過去被動式。