13)陈述部分主语是指示代词或不定代词everything, that, this nothing, 疑问部分主语用it 。Everything is ready, isn't it? 14)陈述部分为主语从句或并列复合句，疑问部分有三种情况：a.并列复合句疑问部分，谓语动词根据邻近从句的谓语而定。As Mr. Smith had been to Beijing for several times, he should have beenin China now, shouldn't he? b.带有定语从句，宾语从句的主从复合句，疑问部分谓语根据主句的谓语而定：He isnot the man who gave us a talk, is he? He saidhe wanted to visit Japan, didn't he? c. 上述部分主句谓语是I ;wethink, believe, expect, suppose,imagine 等引导的宾语从句，疑问部分与宾语从句相对应构成反意疑问句。I don't thinkhe is bright, is he? We believeshe cando it better, can't she? 15) 陈述部分主语是不定代词everybody, anyone, somebody,nobody, no one等，疑问部分常用复数they，有时也用单数he。
Everyone knows the answer, don't they?(does he?) Nobody knows about it, do they? (does he?)