关于这个句子It is the custom in that country for women to cover their faces when they go outIt is the custom in that country for women to cover their faces when they go out这个句子怎么划分成分或者说是什么句型?

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关于这个句子It is the custom in that country for women to cover their faces when they go outIt is the custom in that country for women to cover their faces when they go out这个句子怎么划分成分或者说是什么句型?

关于这个句子It is the custom in that country for women to cover their faces when they go outIt is the custom in that country for women to cover their faces when they go out这个句子怎么划分成分或者说是什么句型?
关于这个句子It is the custom in that country for women to cover their faces when they go out
It is the custom in that country for women to cover their faces when they go out这个句子怎么划分成分或者说是什么句型?

关于这个句子It is the custom in that country for women to cover their faces when they go outIt is the custom in that country for women to cover their faces when they go out这个句子怎么划分成分或者说是什么句型?
主语:to cover their faces when they go out
形式主语:it
状语:in that country(地点) for women(目的)
表语:is
it 引导的主语从句
是主系表的结构