Question

9．It is believed that Loulan was gradually covered by sandstorm from AD 200 to AD 400．（根據(jù)上句完成下句）
Loulan is believed _____________________________________________________________．

Answer 1

分析 大家相信樓蘭是從公元前200年到公元前400年逐漸被沙塵暴淹沒(méi)的．

解答 答案：to have been gradually covered by sandstorms  from AD200 to AD400．
本句考查句型sb/sth is reported/believed to do/to have done，可以轉(zhuǎn)化成It is reported/believed that sb、sth do/have done；因?yàn)闃翘m是被掩埋的，用不定式完成式的被動(dòng)，故答案為to have been gradually covered by sandstorms from AD200 to AD400．

點(diǎn)評(píng) 對(duì)于句型轉(zhuǎn)換的題目要分析原句的句型結(jié)構(gòu)，并找出同義句型或者相同意思的表達(dá)方式，或者使用非謂語(yǔ)動(dòng)詞的形式，或者從句的形式以及一些特殊句式等，要根據(jù)句式結(jié)構(gòu)特點(diǎn)進(jìn)行靈活選擇．