it had long been a dream of mine to travel to the west lake
问题描述：
it had long been a dream of mine to travel to the west lake
it had long been a dream这种语法结构我不理解.
我只会写i had a dream to bla bla
请帮我解释一下这种语法结构
答
it指代 to travel to the west lake这个不定式,他才是真正的主语.had been 是过去完成时.其实这里改为has been 可能会比较好一些.而且感觉这个句子不是很准确.个人觉得of mine改为 for me会比较好.