What's the English expression that means 感叹词："坏了"

Question

In Chinese there is a 感叹词："坏了", means something went unexpected wrong. Example:

坏了，下雨了
坏了，手机忘带了
坏了，迟到了

What are the common English expressions that can express that "astonishing strike"?

UPDATE: Thanks everyone for your answer. To foster participation, I'll make my pick a week later.

Answer 1

What about:

• "Shoot!"
  • "Shoot; it's raining."
  • "Shoot; I forgot to bring my phone."
  • "Shoot; I'm late."
• "Darn."
  • "Darn, it's raining."
  • "Darn! I forgot to bring my phone."
  • "Darn; I'm late."
• "Oh no."
  • "Oh no, it's raining."
  • "Oh no. I forgot to bring my phone."
  • "Oh no; I'm late."

To emphasize that "astonishing strike," perhaps something like

"Shoot, shoot, shoot! Darn it! I forgot to bring my phone!"

"坏了，坏了！忘带手机了！"

Answer 2

I am native speaker of Chinese. I guess "oh, no", "gosh", or "too bad" are OK.

Answer 3

"Damn!"

"Hell!"

"Crap!"

These are pretty colloquial.