1 During the 1990s, 介词短语做时间状语American 定语country 定语music 主语has become 系动词,做复合谓语more and more 副词比较级,做状语popular.表语 2 We 主语often 副词做状语speak 谓语English 宾语in class.介词短语,做地点状语 3 One-third 主语of the students 介词短语,做定语,修饰主语One-thirdin this class 介词短语,做定语,修饰the studentsare girls. 系表结构,做复合谓语 4 To swim in the river 不定式短语,做主语is a great pleasure.系表结构,做复合谓语 5 Smoking 动名词做主语does 谓语harm 宾语to the health. 介词短语,做状语
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