精典范例:
　　Let the word go forth from this time and place, to friend and foe1 alike, that the torch has been passed to a new generation of Americans, born in this century, tempered by war, disciplined by a hard and bitter peace, proud of our ancient heritage, and unwilling to witness or permit the slow undoing of those human rights to which this nation has always been committed, and to which we are committed today at home and around the world.
　　So let us begin anew, remembering on both sides that civility is not a sign of weakness, and that sincerity is always subject to proof. Let us never negotiate out of fear, but let us never fear to negotiate.
　　Now the trumpet summons us again - not as a call to bear arms, though arms we need2; not as a call to battle, though embattled we are3; but a call to bear the burden of a long twilight struggle, a year in and year out "rejoicing in hope, patient in tribulation," a struggle4 against the common enemies of man: 5 tyranny, poverty, disease, and war itself.
　　And so, my fellow Americans, ask not what your country can do for you6; ask what you can do for your country.
　　--美國前總統(tǒng)John F. Kennedy
　　注意：
　　 (1)劃線部分為平行結(jié)構(gòu)
　　 (2)例 1.頭韻；例2&3. "We need arms"和 "We are embattled"為倒裝結(jié)構(gòu)；例4.同位語；例5.見冒號的用法。
　　在句中使用 "and" 或"on"時, 須連接結(jié)構(gòu)相同的部分。總的原則是：詞與詞相配, 短語和短語相配,從句和從句相配 ,句子則和句子放在一起。所有這些搭配必須是平行結(jié)構(gòu)，它們應(yīng)采用相同的形式。
　　 No: My parents went to Tibet, to Mongolia, and they even saw Hong Kong and Macau.
　　Yes: My parents went to Tibet, to Mongolia, and even to Hong Kong and Macau.
　　No: Jonathan noticed the way Stephanie talked and how she kept fidgeting with her fingers.
　　Yes: Jonathan noticed how Stephanie talked and how she kept fidgeting with her fingers.
　　 一些連詞，如 both/and, either/or, neither/nor,和not only/but also.常用于連接平行結(jié)構(gòu)。
　　No: That conference was both helpful and contained a lot of information.
　　Yes: That conference was both helpful and informative.
　　No: Here we either turn left or right, but I forget which.
　　Yes: Here we turn either left or right, but I forget which.
　　No: Fu Chong, the pianist, was heavily influenced both by his mentor and his parents.
　　Yes: Fu Chong, the pianist, was heavily influenced by both his mentor and his parents.
　　No: Elizabeth’s overcoat is at either the theater or her dormitory.
　　Yes: Elizabeth’s overcoat is either at the theater or in her dormitory.

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