關於英文be built using的文法問題。?

Let's look at the following three expressions:
(1) be "built" of something: (= to be made using particular materials)
e.g. The Eiffel Tower was built of iron. (not built with iron, as iron is a kind of materials)

(2) "use" something (as a tool, method, service, ..etc.) to do something
e.g. Gustave Eiffel used iron to build the Eiffel Tower.
= The Eiffel Tower was built (by Gustsave Eiffel) using iron.
("using" is a participle and can't follow a preposition)

Gustave Eiffel used rivets (鉚釘) to build the Eiffel Tower.
= The Eiffel Tower was built (by Gustsave Eiffel) using rivets.

(3) preposition "with" = using something as a tool or by means of something
e.g. He cut the cake with a knife.
The construction workers built the Eiffel Tower with wooden scaffolds.

(A) If you want to mean "iron" as a kind of building materials, (in fact, it is)
the best option would be: (1) The Eiffel Tower was built of iron.

The iron, as in (2), represents the main component rather than a kind of materials.

(B) If you want to show HOW or in what way the Eiffel Tower was built, you may use the preposition "by".
e.g. They built the Eiffel Tower by setting up wooden scaffolds. ("setting" is gerund, object of preposition)
e.g. They built the Eiffel Tower by rivets.

1.) 何謂 "participle construction"?此一分詞片語是修飾"主要句子＂的主詞
The Eiffel Tower was designed by Gustave Eiffel
The Eiffel Tower was built with iron.

(the Eiffel Tower) Designed by Gustave Eiffel, the Eiffel Tower was built with iron.
(Gustave Eiffel) Using iron, Gustave Eiffel designed and built the Eiffel Tower.

2.) The Eiffel Tower was built using iron.
using iron 在句中的功用是修飾動詞 was built，文法上稱作adjunct，原句中using 可以 with替代。
adjunct的功用，在於修飾動詞片語或全句，"而非該句主詞"。

The Eiffel Tower was built in 1889. (in 1889 是adjunct)
The Eiffel Tower was built for the World's Fair in Paris in 1889. (for the World's Fair， in Paris， in 1889 都是 adjunct)

例句:
The network behavior was analyzed using a network analysis software.
為何不能改寫成
(X) Using a network analysis software, the network behavior was analyzed. (the network behavior 不會自行決定使用analysis software)
(O) Using a network analysis software, Engineers analyzed the network behavior.

using iron是修飾述部was built的「分詞構句」。前面的動詞寫成主動態時：People built the Eiffel Tower, using iron.「分詞構句」是不能加介系詞by在前面的。
因為「被動態動詞」後面如果寫by xxx時，通常xxx應是原來的主詞（即動詞為主動態時的主詞），如：people。不會是using iron。