这种结构的连词有both…and…, ...and as well, as well as, both, but, or, nor, not only...but (also), either...or, neither...nor, than, whether...or等。处于平行关系的部分可以是句子中的任何成分，包括名词、代词、数词、形容词、副词、动词、动名词(短语)、不定式短语、介词短语、分词短语、从句等。但试题中一般以短语和分句的平行结构为最多。连接词所连接的部分通常在语言形式上趋向一致，或同为不定式，或同为结构一样的从句等。
例：Even as a girl, ___to be her life, and theater audiences to be her best teachers.
A. performing by Melissa
B. it was known that Melissa's performances were
C. knowing that Melissa's performances were
D. Melissa knew that performing was