简洁 1. because of +物主代词+动作性名词不如because+名词+动词简洁，即because of 只用于非常简洁的结构，t48 。 2. 虚拟语气中的should一定要省略 3. 句子中不得有重复的成分，如soaring与rise/ increase/ grow/ raise等 (t13), amount to a sum 其中a sum就多余 t101，annual 与a year重复t110, attempt , attempt与try (t6), never regain again重复错误.t246, whether or not应为whether 4. n + that is + adj. 为wordy的表达，正确的是：过去分词/ adj.+ 名词，t34，t151. 如dioxins that are currently uncontrolled 应为currently uncontrolled dioxins 5. not any 应改为no，t59； at one time -> oncet188， the thing that ->what (t30) 6.主语加两个动作，如果两动作有同一主语，则两个动作并列，不能在第二个动作前重复主语 t65，t22e，t135ac。 7. 不要用双重所有格，t202 (sth of sb’s错), t2 (the size of colorado’s错) 没有歧义 1. a+修饰短语（如现在分词短语）+b，如果修饰短语既可以修饰a又可以修饰b，则有歧义，错.t245，t179，262e 2. a and b + 定语从句，要明白定语从句到底修饰哪个，可以考虑使用a +定语从句 and b的形式来解决.t27，t85；在a与b都是单数以及定语从句修饰a和b的话，则可以使用复数谓语的定语从句。t128e 3. increase twice有歧义t72 (两倍/两次) 4. a of b and c ，有歧义，解决办法是c and a of b，t128. 5. 注意从句主语和谓语省略的用法, 如果该从句位于句首则省略的主语即为主句主语, 如果在句中则省略的主语是该从句之前最近的名词，e1；答案中应尽量指明主语与谓语，t69ab，t255a. 6. more + adj. +名词，会有歧义，因为不知more修饰谁：adj还是名词？如more gasoline-efficient cars，可以考虑使用如此结构: cars more gasoline-efficient. t112 7. 在描述a拥有b的时候，如果ab都使用单数，则有歧义：每个a拥有复数b还是复数a拥有复数b，解决办法是把a换成单数，t252 单复数的一致 1. 复合主语，谓语用复数t249 . bluegrass musician bill monroe, whose repertory, views on musical collaboration, and vocal style were influential on generations of bluegrass artists. was also an inspiration to many musicians, that included elvis presley and jerry garcia. whose music differed significantly from his own. (a) were influential on generations of bluegrass artists, was also an inspiration to many musicians, that included elvis presley and jerry garcia, whose music differed significantly from (b) influenced generations of bluegrass artists, also inspired many musicians, including elvis presley and jerry garcia, whose music differed significantly from (c) was influential to generations of bluegrass artists, was also inspirational to many musicians, that included elvis presley and jerry garcia, whose music was different significantly in comparison to (d) was influential to generations of bluegrass artists, also inspired many musicians, who included elvis presley and jerry garcia, the music of whom differed significantly when compared to(e) were an influence on generations of bluegrass artists, was also an inspiration to many musicians, including elvis presley and jerry garcia, whose music was significantly different from that of 2. each of…every one of …为单数 3. a and b + 复数动词，即无论a，b是cn 还是un. t107 4. there be 句型中，单复数应有后面的句子主语来决定. 5. 一本书应用单数t174 6. 在以下结构中注意数的一致, 名词a+ be 动词/act as/…+ 另一名词b, 应该保证a与b在单复数上一致. 如t1, t3. men and women… when a child (有a child与men and women不一致); some bat caves have residents that take on different duties such as defending…, acting as sentinels…(这里residents与sentinels一致) 7. 考虑主谓一致的时候，不仅要注意主语的单复数，同时也要注意指代主语的代词的单复数，以此来排除一些选项，t265d 8. 注意复数对应复数t61，t97，t122. eg. iguanas are still prized as game animals
