3基本句型的转换形式 上一节所讲的基本句型都是陈述句、肯定句和主动句,它们可以 通过一定的转换规则变为疑问句、否定句和被动句 1)陈述句变疑问句 ⊙陈述句的词序通常是主语在前,谓语在后,如果把操作词移至主 语之前,原来的句号改为问号,陈述句就变成了疑问句 He is interested in history. The guests have arrived Is he interested in history Have the guests arrived? 如果陈述句的谓语动词只包括一个主动词,在变换时需借用助动 词do的适当形式为操作词置于主语之前。 例如: He teaches English She came late Does he teach English? Did she come late 如果疑问句的主语是个疑问代词或是带有疑问词作限定词的名词词 组,这就不必改变词序 Who is mistaken? Whose car is this? What happened Which one is yours ?3 基本句型的转换形式 上一节所讲的基本句型都是陈述句、肯定句和主动句，它们可以 通过一定的转换规则变为疑问句、否定句和被动句。 1）陈述句变疑问句 陈述句的词序通常是主语在前，谓语在后，如果把操作词移至主 语之前，原来的句号改为问号，陈述句就变成了疑问句。 He is interested in history. The guests have arrived. Is he interested in history? Have the guests arrived? 如果陈述句的谓语动词只包括一个主动词，在变换时需借用助动 词do的适当形式为操作词置于主语之前。 例如：He teaches English. She came late. Does he teach English? Did she come late? 如果疑问句的主语是个疑问代词或是带有疑问词作限定词的名词词 组，这就不必改变词序。 Who is mistaken？ Whose car is this？ What happened？Which one is yours？