ability of doing 表示能力的特征，应该是有能力去干某事，用to do。在GMAT考试中今天我们就来说一下GMAT语法“关于能力”的固定搭配。
固定搭配：be able to do
be capable of doing
have ability to do ; ability of sb. to do
have capability to do doing ; capability of sb. to do doing
真题1：
Sulfur dioxide, a major contributor to acid rain, is an especially serious pollutant because it diminishes the respiratory system’s ability to deal with all other pollutants.
A. an especially serious pollutant because it diminishes the respiratory system’s ability to deal
B. an especially serious pollutant because of diminishing the respiratory system’s capability of dealing
C. an especially serious pollutant because it diminishes the capability of the respiratory system in dealing
D. a specially serious pollutant because it diminishes the capability of the respiratory system to deal
E. a specially serious pollutant because of diminishing the respiratory system’s ability to deal.
翻译：
二氧化硫，酸雨形成的主要因素，是一个特别的污染物，因为他减少呼吸系统抵御其他污染物的能力。
句式：
Sulfur dioxide, … , is…pollutant because it diminishes…ability to deal with…
思路：
Specially和especially的用法;capable of的用法。
选项：
A. 正确;
B. capability of dealing用法搭配不对;
C. capability of dealing用法搭配不对;
D. Special表达错误;
E. Special表达错误。
引申：
1) capability to do固定表达方式;
2) Special和especial
specially, which means "in a special way",
the specially crafted exclusive edition of this car costs more than the standard edition
especially, which means "in particular" or "more so than all the others".
真题2：
Though subject to the same wild-animal control efforts that killed off almost all the wolves in North America over the past century, the coyote’s amazing ability of adapting to the presence of humans has enabled it to expend its range into Alaska and Central America.
A. coyote’s amazing ability of adapting to the presence of humans has enabled it to expend its
B. coyote, because of its amazing ability of adapting to the presence of humans, have been able to expand their
C. coyote, because of its amazing ability to adapt to the presence of humans, has been able to expand its
D. amazing ability of the coyote to adapt to the presence of humans have enabled it to expand the
E. amazing ability of the coyote to adapt to the presence of humans has enabled it to expand the
翻译：
尽管遭遇了同样的几乎杀死北美所有狼的野生动物控制措施，coyote对适应人类存在令人吃惊的能力使它的范围扩展到了阿拉斯加州和中美洲。
句式：
Though subject to…, the coyote, because of sth., has been able to expand its range into…
思路：
找出句子主语，比较各选项的不同，注意代词的使用。
选项：
A. 逻辑主语应该是coyote，而不是coyote’s amazing ability。ability of doing 表示能力的特征，应该是有能力去干某事，用to do
B. have 应该是has，their和前面的its不对应
C. 正确
D. 逻辑主语应该是coyote，have 应该是has，ability和enable重复，均表示能力
E. 逻辑主语应该是coyote，ability和enable重复。
引申：
1) be subject to sth
Be subject to sth. If someone or something is subject to something, especially something bad, it is possible or likely that they will be affected by it.
2) 固定搭配：ability to do sth.有能力做某事;ability of sth./sb. 某某某的能力。
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