如果你想问对方喜欢什么水果，你可以这样问：

"What's your favorite fruit?"

如果你想告诉对方他喜欢的水果是什么，你可以这样说：

"Your favorite fruit is (fruit name)."

例如：

"Your favorite fruit is apples."

"Your favorite fruit is bananas."

"Your favorite fruit is pears."

希望这可以帮到你！