精选优质文档-倾情为你奉上 句子成分；简单句、并列句和复合句一、句子成分（一）句子成分的定义：构成句子的各个部分叫做句子成分。句子成分有主要成分和次要成分；主要成分有主语和谓语；次要成分有表语、宾语、定语、状语、补足语和同位语。（二）主语：主语是一个句子所叙述的主体，一般位于句首。但在there be结构、疑问句（当主语不疑问词时）和倒装句中，主语位于谓语、助动词或情态动词后面。主语可由名词、代词、数词、不定式、动名词、名词化的形容词和主语从句等表示。 画出下列句子的主语：During the 1990s, American country music has become more and more popular.We often speak English in class.One-third of the students in this class are girls.To swim in the river is a great pleasure.Smoking does
