For or to Can't understand when to use "for you" and when "to you" For example "I have got a gift for/to you" I mean cases like this one, not only with "you" but the other pronouns or people's names and so on

Infinitive or gerund Is there a difference between prefer to+verb and prefer+gerund? If it is,is it big? How does it change the meaning?

Alphabet What does the circle to the left of the letter mean?I've seen a picture of the alphabet,which was without this circle and other picture with it ,so I don't understand the meaning of it Explain,please I've just started to learn Korean