英语写作中的从句之一：名词性从句

注：同位语从句前面的名词多为fact, reason, idea, problem, question, conclusion等抽象名词。 2. 使用主语从句注意主谓一致问题 1) 单个名词性从句做主语时，其后的动词通常用单数。 2) 两个由and 连接的并列名词性分句作主语，如果主语表示两件事情，动词用复数。 What caused the accident and who was responsible for it remain a mystery to 3) 在以what-分句作主语结构中，如果be 动词后面是复数名词，谓语动词用复数形式。 What caused the accident is a complete mystery. What was real to him were the details of his life. 4) 如果what-分句本身明显表示复数意义，谓语动词用复数。 What are often known as best-seller books are not really interesting for everyone. （责任编辑：赵颖茹）