回答如下：

“move away” 不是介词短语，而是动词短语，即动词move + 副词away。英语介词短语是介词+宾语。介词的宾语包括名词、代词、动名词、宾语从句等。例如：

He is in the room.

She died for the country.

Go with us.

He stood under the tree.

She is fond of swimming.