It belongs to both you and me.
but not
It belongs both to you and me.
An interjection is a word or sound expressing emotion only such as a shout, a groan, a hiss, a sob, or the like, such as Oh, alas, hush.
The position of words in a sentence is often very important. Misplacement will frequently cause ambiguities and absurdities which punctuation will not remove. What does the phrase "I only saw him" mean? A newspaper advertisement describing a certain dog which was offered for sale says "He is thoroughly house-broken, will eat anything, is very fond of children." As a rule modifiers should be kept close to the words, clauses, or phrases which they modify, but due regard should be given to sense and to ease of expression.
A word or phrase which can be easily supplied from the context may often be omitted. Care must be used in making these omissions or the result will be either ambiguous or slovenly.
Washington is nearer New York than Chicago.
What exactly does this mean? One might get into serious trouble over the interpretation of the phrase "He likes me better than you."