Q26:
There are several ways to build solid walls using just mud or clay, but the most
extensively used method has been the forming of bricks out of mud or clay, and, after
some preliminary air drying or sun drying, they are laid in the wall in mud mortar.
A. the forming of bricks out of mud or clay, and, after some preliminary air drying or
sun drying, they are laid
B. forming the mud or clay into bricks, and, after some preliminary air drying or sun
drying, to lay them
C. having bricks formed from mud or clay, and, after some preliminary air drying or
sun drying, they were laid
D. to form the mud or clay into bricks, and, after some preliminary air drying or sun
drying, to lay them
E. that bricks were formed from mud or clay, which, after some preliminary air
drying or sun drying, were laid
Answer: D
Mine B
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看上去就很乱的题目，但是觉得D的has been to form 似乎有点问题，更倾向于用B的 Has been forming
NN们出水解惑啊
这里has been是谓语，to form 和to lay 一起作为不定式做表语。另外，题目时态不要求用完成进行时态，答案B还改变了题目的意思；同时B选项里面，form和lay引导的动作还不是并列的形式。
这题怎么会has been前后元素词性不同呢? A正好就是两个名词并列, 多好啊, OG不是也有一题强调这个吗?
NN出来讲解一下吧, 困惑!
NN帮忙看看吧.
为了好理解，我把has been改成is。这样就简单了，原句可以变成：
the method is to form bricks and to lay them in the wall.所以D对。
A可简化成：the method is the forming of bricks, and they are...前后不平行。
B可简化成：the method is forming bricks and to lay them in the wall.前后不平行。
我当时对于这个题目也是觉得有点不爽, 正好就一起问了, 楼上几位可以先看看OG对于一个类似的Be平行的解释:
84. One legacy of Madison Avenue's recent campaign to appeal to people fifty years old and over is the realization that as a person ages. their concerns change as well.
(A) the realization that as a person ages, their
(B) the realization that as people age, their
(C) to realize that when a person ages, his or her
(D) to realize that when people age, their
(E) realizing that as people age, their
In choice A, the plural pronoun their does not agree in number with the singular noun person. Choices C, D, and E can be faulted for failing to complete the construction One legacy ... is with a noun that matches the noun legacy; these choices use verb forms--the infinitive to realize or the present participle realizing--in place of a noun such as realization. Further, when in C and D is less precise than as in characterizing a prolonged and gradual process such as aging. B is the best answer.
从Be动词的平行角度看, 似乎天山这题有点怪, 请教大家!
个人觉得ETS所说的平行不是绝对的。以OG84题为例，其结构是“one legacy... is the realization”,主语与标语共同用名词来平行。但同样，在GMAT中还存在“the way... is to do..”的结构。我个人以为，这主要是由主语决定的。“方法（way,method等）”可能是名词（比如有道提取金矿的题，**方法是早在××年前就已经确立的一种提取金矿的方法，具体题号忘了），但也可能是表示一系列动作的。
天山的这个题是说：有很多方法能建造坚固的墙，但最常用的方法是用泥和石灰做成砖，然后经过日晒或风干后，用灰泥来砌墙。句子基本结构是"the method has been to do and to do"需要两个动作并列，所以选D。
A选项用the forming of。。。（名词）与they were laid（句子）并列，错误
B选项用forming...（分词短语）与to lay（不定式）并列，错误
C选项用having bricks formed from mud or clay（分词短语）与they were laid（句子）并列，错
E选项，the method has been that的大结构没有错误，但从句中which修饰的是mud or clay，修饰对象错，句意错
应该先看大的平行结构，再看小的
楼上说的题目我好像也有印象, 但是刚才没有找到, 不知道可否给出题号?
偶也感觉这个题目the method is to do sth的结构以前好像很少见。is前后应该要平行的两个概念。不过A答案后面的部分用了被动，也不好。
这个题目很奇怪。
同意楼上的!
我在排除完只剩下B和D选择时根据的就是平行结构:
前面的ways to build 和后面的 the methods to form 就是很好的平行和对称！
此题选E
method be +that引导的名词性从句正是method be n.的结构。另外注意E中使用的是which were,所以这个which是跳跃修饰bricks,不是mud or clay。如果which是修饰mud or clay这两个由or连接的单数名词应该用which was，故此which没有修饰歧异。
A中and前后并列明显扭曲原意。method has been....and they are laid....
B:forming ...and to lay 并列错。
C:having错
D中：method is to do and to do.2个to do 代表一个method感觉很怪。此外，就如OG所说，method be n. 才是正确用法。
Q26:
There are several ways to build solid walls using just mud or clay, but the most extensively used method has been the forming of bricks out of mud or clay, and, after some preliminary air drying or sun drying, they are laid in the wall in mud mortar.
A. the forming of bricks out of mud or clay, and, after some preliminary air drying or sun drying, they are laid
B. forming the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them
C. having bricks formed from mud or clay, and, after some preliminary air drying or sun drying, they were laid
D. to form the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them
E. that bricks were formed from mud or clay, which, after some preliminary air drying or sun drying, were laid
我實在不明为何 have been + to form...
is it 为了平行 to build soild walls?
麻煩大家了～～
同意
嗯，我也是这样做这道题滴
有个疑问，Q26:
There are several ways to build solid walls using just mud or clay, but the most
extensively used method has been the forming of bricks out of mud or clay, and, after
some preliminary air drying or sun drying, they are laid in the wall in mud mortar.
A. the forming of bricks out of mud or clay, and, after some preliminary air drying or
sun drying, they are laid
B. forming the mud or clay into bricks, and, after some preliminary air drying or sun
drying, to lay them
C. having bricks formed from mud or clay, and, after some preliminary air drying or
sun drying, they were laid
D. to form the mud or clay into bricks, and, after some preliminary air drying or sun
drying, to lay them
E. that bricks were formed from mud or clay, which, after some preliminary air
drying or sun drying, were laid
答案是D,我也选D，但D中and前的逗号是不是不应该有的呢？在我的印象中“，”后加连词如and,but等意味着两个并列的主句，如果是并列的是两个主语一样的成分，应该不加“，”，直接加连词，所以D的表述应为
the most extensively used method has been to form the mud or clay into bricks and, after some preliminary air drying or sun drying, to lay them
或者是不是两个并列的独立主句才必须用“，and”，而两个共同主语的并列成分既可以用“，and"也可以用不加“，"的and
哪位大牛请指教
有个疑问，Q26:
There are several ways to build solid walls using just mud or clay, but the most
extensively used method has been the forming of bricks out of mud or clay, and, after
some preliminary air drying or sun drying, they are laid in the wall in mud mortar.
A. the forming of bricks out of mud or clay, and, after some preliminary air drying or
sun drying, they are laid
B. forming the mud or clay into bricks, and, after some preliminary air drying or sun
drying, to lay them
C. having bricks formed from mud or clay, and, after some preliminary air drying or
sun drying, they were laid
D. to form the mud or clay into bricks, and, after some preliminary air drying or sun
drying, to lay them
E. that bricks were formed from mud or clay, which, after some preliminary air
drying or sun drying, were laid
答案是D,我也选D，但D中and前的逗号是不是不应该有的呢？在我的印象中“，”后加连词如and,but等意味着两个并列的主句，如果是并列的是两个主语一样的成分，应该不加“，”，直接加连词，所以D的表述应为
the most extensively used method has been to form the mud or clay into bricks and, after some preliminary air drying or sun drying, to lay them
或者是不是两个并列的独立主句才必须用“，and”，而两个共同主语的并列成分既可以用“，and"也可以用不加“，"的and
好像很有道理，不知道标点的运用了，顶！
OG 12~~ 传说中的新版OG，XDF门口盗版的要我50大洋，我愣是没舍得....
PS: 我觉得E的句子结构没什么错误，但是逻辑实在不如D的好。
1/ which的位置很容易然人误认为修饰clay，但是后面的were证明了which从句确实是跳跃修饰brisks的。
2/ after从句的位置也不好，语法上修饰clay，但是逻辑上是修饰brisks。
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