【TPO24和25】中的两句【难句】，求解释

czfwillpanUID: 3403637

1.Few of the cultural traditions and rules that today allow us to deal with dense populations existed for people accustomed to household autonomy and the ability to move around the landscape almost at will.

这里的existed和accustomed分别是什么结构，省略？还是分词？分词的话不应该是existing表主动么？

2.The ancestors of plants were photosynthetic single-celled organisms that gave rise to plants presumably lacked true roots, stems, leaves, and complex reproductive structures such as flower.

同样这里的lacked是什么结构，如果改成lacking表主动可以么？

3.In addition, other lines of evidence support the hypothesis that land plants evolved from ancestral green algae used the same type of chlorophyll and accessory pigments in photosynthesis as do land plants.

这里的used是什么结构

希望懂的同学能帮我看看，帮我解答一下，这几句话意思能理解，但是分析结构的时候就遇到问题了。

czfwillpanUID: 3403637

听人说是什么后置定语之类的，但是实在无法理解，句子里面看着是表示主动的，但为什么加ED，难道是表过去么，它们不是应该是非谓语么，真的完全凌乱了，求大神们赐教

luketc3580UID: 3369182

这种语法问题貌似需要绿绿首席来解答了，我完全不记得这是什么结构了

其实句子能读懂就好~

czfwillpanUID: 3403637

luketc3580 发表于 2014-4-25 18:51
这种语法问题貌似需要绿绿首席来解答了，我完全不记得这是什么结构了

其实句子能读懂就好~

对啊，能读懂，就是句子结构分析起来超级蛋疼。

噢GOGOUID: 3481439

Few of the cultural traditions and rules that today allow us to deal with dense populations existed for people accustomed to household autonomy and the ability to move around the landscape almost at will.

existed 应该是谓语吧？ accustomed 前面是省略了who？

czfwillpanUID: 3403637

噢GOGO 发表于 2014-4-25 22:45
Few of the cultural traditions and rules that today allow us to deal with dense populations existed  ...

多读读之后好像是，之前的allow是从句里的，existed是整句的谓语，accustomed to 应该是省略了be，做过去分词，表被动的，修饰people。

但是第二句如何破？？？

噢GOGOUID: 3481439

.The ancestors of plants were photosynthetic single-celled organisms that gave rise to plants presumably lacked true roots, stems, leaves, and complex reproductive structures such as flower.
应该是分句的谓语吧 lack过去式 要不然分句里没谓语