※ 引述《ev3393 (Mark)》之銘言：
: 請教大大 我們都知道兩個獨立子句中需連接詞，
這個原則完全正確，沒有問題。
: 但為什麼有些閱讀測驗段落只用逗號連
: 結(如下面兩段皆用逗號)？
因為您舉的兩個例子中都沒有兩個以上的獨立子句，所以並沒有連接獨立子句的連接詞。
但是例一中有連接複合動詞的連接詞。
: 如果英文作文這樣寫是對的嗎?
: 目前找不到相關解說，能否提供相關資訊，謝謝!
: 段落一
: Around 1606, he had studied dispersion in prisms, measured the refractive indi
: ces of different liquids placed in a hollow glass prism, studied refraction in
: crystal spheres, and correctly understood refraction in the rainbow before De
: scartes.
上述句子解析如下：
Around 1606,
he [S] had studied [V1] dispersion in prisms,
measured [V2] the refractive indices of different liquids placed in a
hollow glass prism,
studied [V3] refraction in crystal spheres,
and [conj]
correctly understood [V4] refraction in the rainbow before Descartes.
主詞 he 後面跟著由四組動詞片語 (verb phrase) 構成的 compound verb 複合動詞結構
：
S Vp1, Vp2, Vp3, and Vp4.
所以這句裡是有用來連接動詞片語的 and，但是由於主詞只有出現一次，所以並沒有兩個
獨立子句，因此不需要用來連接獨立子句的連接詞。
: 段落二
: Perhaps the most interesting thing is that the first discovery of the sine law
: , made by the sixteenth-century English scientist Thomas Harriot (1560-1621),
: has been almost completely overlooked by physicists, despite much published ma
: terial describing his contribution.
上述句子解析如下：
Perhaps the most interesting thing [S1] is [V1]
that the first discovery of the sine law [S2],
made by the sixteenth-century English scientist Thomas Harriot
(1560-1621),
has been almost completely overlooked [V2] by physicists,
despite much published material describing his contribution.
獨立子句：S1 + V1 + that 子句 (這個 that 子句是從屬的名詞子句當作補語用)
從屬子句：that S2 + V2
made by ... 1621) 是過去分詞片語用作修飾語，說明 the first discovery of the
sine law
despite ... contribution 是介係詞片語，用以表讓步內容
所以，本句只有一個獨立子句配上一個從屬子句，因此也沒有兩個獨立子句，所以也不需
要用來連接獨立子句的連接詞。
以上
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