5、10hoursaday.2.含有宾语从句的主动结构变为被动语态时,通常用it作为形式主语,从句放后。例如:WeknowthatBritainisanislandcountry.→_________________thatBritainisanislandcountry.Theteachersaidthatthisbookhasbeentranslatedintoseverallanguages.→___________thatthisbookhasbeentranslatedintoseverallanguages常见的"Itis+过去分词+that"句型还有 It