My father likes to sneak up on my mother and tickle her.我爸爸喜欢悄悄走近我妈妈，挠她痒痒。

Don't sneak up on me like that!不要这样偷偷走近我！

My birthday really snuck up on me this year.今年我的生日悄然而至。

This kind of problem can sneak up on you if you're not attentive.如果你不留意，这类问题就会悄然出现。