Parallel Structures
许多句子在描述一个人或一件物品时往往会出现一系列修饰语；动词的修饰语,即副词往往也会几个同时使用,构成平行结构,平行结构要求语法结构须保持一致,如：
1．系列动词：
after school,we sang,danced and played the piano in the classroom.
2．系列形容词：
She is slim,tall,blond and beautiful.
3．系列副词：
The students are listening to me carefully and eagerly.
平行结构不仅包括动词,形容词,副词,也包括分词,不定式,动名词,名词短语和句子等的平行用法,务必提高辨别力.