It's common to use 'Excuse me, ...' to get someone's attention in English. Another, more formal form is 'I beg your pardon ...'
Example Dialogues
Person 1: Excuse me, do you know what time it is?
Person 2: Yes, it's two o'clock.
Person 1: I beg your pardon. Would you minding helping me a moment?
Person 2: Certainly. What can I do to help?
Sometimes, if a situation is more urgent, we use forms that might be considered rude in other less urgent situations. The most common of these forms is the imperative. The imperative form is also commonly used to give directions or commands, but in a dangerous situation can be used to warn.
Verb + Objects + !
Watch out!
Be careful!
Pay attention to what you are doing!
