大家讨论一下管卫东的一道真题

observer

For protection from the summer sun, the Mojave lived in open-sided, flat-topped dwellings known as shades, each a roof of poles and arrowweed supported by posts set in a rectangle. A. each a roof of poles and arrowweed B. each a roof of poles and arrowweed that are being C. with each being a roof of poles and arrowweed D. with roofs of poles and arrowweed to be E. with roofs of poles and arrowweed that are Answer:A WHY A IS RIGHT？

sammen

with roofs说明1个shade有好几个roofs,不符合逻辑，DE错。Cwith each being wordy,要是with a roof of poles and arroweed我倒是认为对。B很明显that are being wordy。A我理解是同位语。

sunhong81

a 独立主格结构 其他的确实很容易仍掉的啊

vanillawang

用排除法可以很快去掉BCDE. 原句是一般过去时, BE出现现在时. C中with错,being错. D中to be多余, 且意思错. 读完原句可能不认为dwelling就是roof. 但是排除了BCDE后, 就应该可以理解了.

eilekioa

原话中逗号后的是独立结构，each 是独立结构的逻辑主语，a roof ....是逻辑谓语的一部分。还原后本句话是“each is a roof and arrowweed supported by posts set in a rectangle.”中文意思是“一个这样的住宅是由几根柱子和...支撑单个屋顶构成。”重点想强调说明是 “一间住宅由一个屋顶构成”

eilekioa

关于其他选项，我是这样分析的： B. 句中进行时态无意义；原话中set in a rectangle 是定语修饰posts C.选项中如果没有being也对因为独立结构可以由加上with; D/E的用法是不对的，并且会产生歧义

uniqueness

我认为，CDE中WITH有歧义，让人有可能认为是Mojave 拥有一个roof，而原意应是dewllings with roof