About two thousand five hundred years ago a Greek historian named Herodotus is said to have made a list of what he thought were the greastest structures in the world.
About two thousand five hundred years ago a Greek historian named Herodotus is said to have made a list of what he thought were the greastest structures in the world.
About two thousand five hundred years ago这个是表示时间
a Greek historian是主语 named Herodotus是修饰a Greek historian
what he thought是what,when,how,who,where,why这类词再加陈述语序变成名词成分
（About two thousand five hundred years ago a Greek historian named Herodotus is said主语） （to have made 谓语）（a list of what he thought were the greastest structures in the world.宾语）
About two thousand five hundred years ago (时间状语）a Greek historian named Herodotus（主语） is said to have made （谓语）a list （宾语）of what he thought were the greastest structures in the world（定语）.
a Greek historian named Herodotus 主语，其中named Herodotus 是动词过去分词做后置定语
is said 是谓语
to have made a list of what he thought were the greastest structures in the world.宾语