英语句子分析1.Even before you read any text,you had already create

1.Even before you read any text,before 引导的时间状语从句； you had already created a mental image of how this page is put together in your mind:over here are the main options ,over there is the article text,and down below are more options.是主句,主句中,主干是 you had already created a mental image of how this page is put together in your mind:,冒号后面是同位语,对主干部分解释说明,如何在脑海里想象课文组织一起的情况.
2.Within News,the local navigation is represented by a vertical menu on the left 是主句.which indicates where you are (Science /Nature is highlighted) and where else you can go ,such as to articles about Africa or the business news section.是由which引导的定语从句,修饰先行词the local navigation （本地导航）；在定语从句中,含有一个宾语从句（where you are (Science /Nature is highlighted) and where else you can go ,such as to articles about Africa or the business news section）