Existential quantifier in clausal form

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How do I handle existential quantifier $\exists$ while converting predicate logic to clausal form?

For example, how do I write this is clausal form:

$$\exists x \operatorname {food}(x)\to \operatorname{likes}(x)$$

Which means there exist a food which John likes.

My try is this:

food(x)^~likes(John,x)

Please tell me if it is right or not. If it is not, how to write it correctly. Also please tell me what would have happened if there was a universial quantifier in place of ∃.

Thank You!