Proposition Phrase用法

1.The children play in the garden.= correct English (孩子在花園內玩耍)

2.The children in the garden play. = ok (花園內的孩子在玩耍, 可能其他孩子不是在玩耍,而是在上課或其他o

Where do the children play?
1.The children play in the garden.
in the garden ~ adverbial phrase (It modifies the verb play}

What do the children in the garden do?
2. .The children in the garden play.
The children in the garden ~ noun phrase. (It functions as a subject.)