be open,当主语是三单时,open加s吗?如：The shopping mall is open at 9 o’clock.为什么open不加s?快

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be open,当主语是三单时,open加s吗?如：The shopping mall is open at 9 o’clock.为什么open不加s?快

be open,当主语是三单时,open加s吗?如：The shopping mall is open at 9 o’clock.为什么open不加s?快
be open,当主语是三单时,open加s吗?如：The shopping mall is open at 9 o’clock.为什么open不加s?
快

be open,当主语是三单时,open加s吗?如：The shopping mall is open at 9 o’clock.为什么open不加s?快
be动词后跟原形.在这里open是表语.要想加s这个句子就是The shopping mall opens at 9 0'clock

Open 在这里是形容词，动词才有第三单形式。

The shopping mall is open at 9 o’clock. 这个句子里面的open是形容词 不是动词，表状态.
这个句子的open是动词，she often opens the door.的要加S.

be open,当主语是三单时,open加s吗?如：The shopping mall is open at 9 o’clock.为什么open不加s?快 be open be open OPEN open open open open open open open OPEN open open open Open to,open for,be opened to,be opened for 意思和用Open to,open for,be opened to,be opened for 意思和用法还有主语各是什么 Let's open the door!的主语 be open,be closed,open,close 它们的区别