所谓托福语法不搭配，就是如果不在该处结束从句，从句写在一起就变成了病句。常见的这样的语法不搭配就是从句主干中第二个谓语动词义群的出现。因为从句主干里只能有一个谓语，出现第二个谓语显然不对。
实例解析1
The fact that half of the known species are thought to inhabit the world's rain forests does not seem surprising，considering the huge numbers of insects that comprise the bulk of the species.
这个句子如果乍一看，fact后面的that表示一个同位语从句的开始。从句什么位置结束，要明白这个问题，首先要知道从句它也是一个句子，句子必须要有完整的主干结构。所以，当它的主干结构完整，后面增加的内容已经和前面的内容不能够搭配的时候，从句就结束了。
这种不搭配，有语法上不搭配和逻辑上不搭配。我们重点关注出现比较多容易辨别的语法不搭配。所谓语法不搭配，就是如果不在该处结束从句，从句写在一起就变成了病句。常见的这样的语法不搭配就是从句主干中第二个谓语动词义群的出现。因为从句主干里只能有一个谓语，出现第二个谓语显然不对。怎么识别谓语，当然要看动词。但是，值得注意的是英语里面有大量的非谓语动词，要排除它们。一般定义：动词原型v，动词原型的第三人称单数变化，动词的过去式，都符合谓语动词定义。动词的现在分词、过去分词、不定式不属于谓语动词定义。
再回到上面这个句子：
从句内部are符合谓语动词，thought，inhabit不属于;当出现does not这个谓语的时候，显然从句已经有了两个谓语，这是病句，必须断句。可以把从句用括号括起来The fact (that half of the known species are thought to inhabit the world's rain forests) does not seem surprising，considering the huge numbers of insects that comprise the bulk of the species.
实例解析2
It was in the cities that the elements (that can be associated with modern capitalism) first appeared.首先这是一个强调句，里面有一个定语从句。定语从句在第二个谓语义群前结束。这里之所以用义群，义群包含了谓语动词及其修饰成分。比如这里的first就是修饰appear的。
实例解析3
It became tempting to suggest that every disease and condition (for which there had been no previous effective treatment)might be responsive to vitamin therapy.这里for which标志从句开始，第二个谓语义群might be前从句结束。
实例解析4
(What is particularly meaningful to anthropologists) is the realization (that although the materials available to a society may to some extent limit or influence what it can do artistically, the materials by no means determines what is done).一个括号结束处，出现了第二个is，所以what开始的从句要结束了。后面that开头的定语从句里面，although后面的结构都不是从句的主干，所以里面出现的谓语动词不能算作从句主干里的谓语动词，从句里面主干谓语动词是determine。

实例解析5
As a result，claims (that eating a diet consisting entirely of organically grown foods prevents or cures disease or provides other benefits to health) have become widely publicized and form the basis for folklore.首先claim是一个动词而不是名词，否则句子就没有主语了。That引导一个同位语从句。这个从句里面的动词很多，什么时候结束这个从句呢?我们来看这个从句，eating动名词做主语，后面的consisting grown都不符合谓语动词条件，prevents一个谓语动词，cures仿佛是第二个谓语动词，这里是不是从句结束呢?不是，因为中间有一个or连接，在语法上不构成病句。句子里是允许有多个谓语动词并列的。往后provides还是和它们并列。后面出现have become的时候才是从句结束位置。所以补加一个小补丁，原来的规律描述变成，从句主干中不和一个谓语义群有并列关系的第二个谓语动词义群出现时，从句在第二个谓语动词义群前结束。本质是不能造成从句内部的语法搭配不当。