the librarian told Sammy that do not talk in the librasy. 用that引导的宾语从句. 祈使句的用法,比如:please tell me how to do that,the girl said. 宾语从句:the girl said that she want to know how to do that.
改成宾语从句: The librarian told Sammy that she should not talk in the library. 用should not 而不用did not是因为由直接陈述转为间接陈述时需要把说话者的语气也表达出来。 也可以用tell sb. to do sth.改写成: The librarian told Sammy not ...