英语句子成分句子成分由词或词组充当英语的基本成分有七种：主语(subject)、谓语(predicate)、表语(predicative)、宾语(object)、定语(attribute)、状语(adverbial) 补语(complement) 主语(Subject)：一.主语 主语是一个句子所叙述的主体，一般位于句首,通常由名词性的词来充当。可由1.名词、2.代词、3.数词、4.名词化的形容词（如the rich）5.不定式、6.动名词、7.主语从句等表示。练习1. 在下面句子的主语下面划横线，并说出由什么充当1. During the 1990s, American country music has become more and more popular. 2. We often speak English in class.3. One-third of the students in this class are girls.4. To swim in the river is a great pleasure.5
