do you know who the clock___?(belong to/does belong to/is it

who do you know does the book with a red cover belong to Who does it belong to? Does not belong to you is do not belong to you. Do you know who the pen belongs to?belong后为什么加s? The sun is belong to you.you belong to me. who do these books belong to?who does these book You is belong to 为什么不能用who does it belong to --who does it belong to 的回答--Me.还是Mine. Whom/Who does the bike belong to?为什么是does不是is? Who does this watch（belong）to? 1,who does this coat belong to?