This morning, to while away the time, we played an ABC game. My 4 year old recited the alphabet, and gave examples of English words that start with that letter.
Me: What starts with F?
4 year old: Fish! Fu-k!
Me: What did you say.... ? Fu-k?
4 year old: Yes. FU-KKK!
Me: Do you know what it means?
4 year old: Fu-k 就是叉子呀 (Fu-k is fork)
Whew! He just can't pronounce "R" properly yet.