Question

 AIDS is said _______ the biggest health challenge to both men and women in that area over the past few years.

A. that it is                                                              B. to be

C. that is has been                                            D. to have been

Answer 1

解析：選D。It is said that+主語=主語+is said to do/have done; 由時(shí)間狀語可知應(yīng)用現(xiàn)在完成時(shí)。

獨(dú)具【方法技巧】人或物+be said后的“多樣化”不定式

在此結(jié)構(gòu)中，主語不可以是形式主語。

1

 不定式的一般式。該形式根據(jù)需要可用主動(dòng)或被動(dòng)式，表示兩種情況。

(1)表示不定式所表示的動(dòng)作尚未發(fā)生或?qū)⒁�發(fā)生。

He is said to go abroad soon. 據(jù)說他不久要出國(guó)。

(2)表示一般情況(尤其是當(dāng)不定式表示狀態(tài)而非動(dòng)作時(shí))。

The tigers are said to be endangered.

據(jù)說這些虎處于瀕危狀態(tài)。

2

 不定式的完成式。表示不定式所表示的動(dòng)作已經(jīng)完成。該不定式根據(jù)需要可選用主動(dòng)或被動(dòng)式。

This book is said to have been translated into several foreign languages. 據(jù)說這本書已被譯成好幾種外語。

3

 不定式的完成進(jìn)行式, 強(qiáng)調(diào)不定式所表示的動(dòng)作迄今為止已經(jīng)持續(xù)了一段時(shí)間。

This film is said to have been going on for two months now. 據(jù)說現(xiàn)在這部電影已經(jīng)連續(xù)上演兩個(gè)月了。

4be said+不定式的進(jìn)行式, 表示不定式所表示的動(dòng)作正在進(jìn)行。

They are said to be researching into the question.

據(jù)說他們正在研究這個(gè)問題。