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完整主句+ adj./adv. than 比较，下面都几题都是这种情况，不知道有没有N人能总结出相关规律。 我个人认为是伴随结构，但是than后面一定要有谓语，主语可以从前省略。
More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 percent of the world's fresh water, more than all the North American Great Lakes combined.
(A) More than 300 rivers drain into Siberia's Lake Baikal, which holds 20 percent of the world's fresh water, more than all the North American Great Lakes combined. (B) With 20 percent of the world's fresh water, that is more than all the North American Great Lakes combined, Siberia's Lake Baikal has more than 300 rivers that drain into it. (C) Siberia's Lake Baikal, with more than 300 rivers draining into it, it holds more of the world's fresh water than all that of the North American Great Lakes combined, 20 percent. (D) While more than 300 rivers drain into it, Siberia's Lake Baikal holds 20 percent of the world's fresh water, which is more than all the North American Great Lakes combined. (E) More than all the North American Great Lakes combined, Siberia's Lake Baikal, with more than 300 rivers draining into it, holds 20 percent of the world's fresh water. ——OA是A。很多人纠结E，我认为E把A的句子重心颠倒了。在A没有绝对性错误的情况下，E不如A优选。
Employment costs rose 2.8 percent in the 12 months that ended in September, slightly less than they did in the year that ended in the previous quarter.
(A) less than they did (B) less than it did (C) less than they were (D) lower than (E) lower than they were ——OA是A。规律就是我上面说的谓语不能省略，同时，如果谓语为were则相关对象的代词单复数和语义都有问题。
GWD7-Q4: Only seven people this century have been killed by the great white shark, the man-eater of the movies—less than those killed by bee stings.
A. movies—less than those B. movies—fewer than have been C. movies, which is less than those D. movies, a number lower than the people E. movies, fewer than the ones ——我选B。规律也是上面的。 同时很多人纠结A。than 后面接单独名词，表示比主语或者宾语。不能用副词less比，应该用形容词。 最早的答案为E，代词ones指的应该是前面的事物本身，这个逻辑意思不可以。
Since the movie was released
seventeen UFOs have been sighted in the state, which is more than had been
sighted in the past ten years together. (A) which is more than had been sighted (B) more than had been sighted (C) more than they had sighted (D) more than had reported sightings (E) which is more than had reported sightings ——这题结构同上题，答案无争议选B，规律再次验证。
完整主句+ adj./adv. as as 比较。这个例题和总结可能还需要补充。 A decade after initiating the nation's mostcomprehensive and aggressive antismoking program, per capita consumption ofcigarettes in California declined from over 125 packs annually per person toabout 60, a drop more than twice as great as in the nation as a whole. (A) per capita consumption of cigarettes in California declined from over 125 packs annuallyper person to about 60, a drop more than twice as great as (B) annual per capita consumption of cigarettes inCalifornia declined fromover 125 packs to about 60, more than twice as great as that (C) California's annual per capita consumption ofcigarettes declined from over 125 packs per person to about 60, more than twiceas great as the drop (D) Californiahas seen per capita consumption of cigarettes decline from over 125 packsannually to about 60, a drop more than twice as great as that (E) Californiahas seen annual per capita consumption of cigarettes decline from over 125packs per person to about 60, more than twice as great as that 这题很多人在D/E纠结，我的感觉E有绝对性错误——per capita 和 per person重复。至于很多人说的是否要加a drop形成同位语结构，我不能肯定。 能肯定的是这个和刚刚than的结构不同，伴随性的than后面必须加完整主谓。而这里一般是 twice(倍数词) +as many/much as +n.的延伸，因此后面只能名词性结构，不加动词。
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发表于 2008-10-22 19:52:00
好棒呀！