How long has the shop been open

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How long has the shop been open
为什么是been open 而不是been opened

这里的open是形容词,如果是opened则是动词的过去式或者被动形式,不是持续性动作.所以是用been open,这句的意思是,这家店开了多久了.
相比之下看close,close如果要做形容词表状态,则只能用closed.
这就是open 和close的区别.
open这个词比较特殊,他既可以表动作又可以表状态做形容词.一般来说动词做形容词,都是用被动形式表示形容词.而open的话,不用变形也可以作为形容词.

How long has the shop been open How long has this shop(）?Abe openB been open C opened Dbeen how long has the factory been open为什么open不用过去分词? How long has the shop__.A,been open.B been opened 答案是B为什么 how long has this shop been established/opened? The shop has been open for 3 years. The book shop () for eight years.A.has been open B..has been the shop opend last year=the shop has been open for a year How long has that factory been ____ It's been open ____ seve How long has this factory been open这句话转变成这样可以吗 How long has he been in the hospital?翻译 How long has the hous been on fire