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
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