When do you use...?
I have seen in a lot of sentences how people add words like, "up", "out" in sentences were I don't think it was necessary. Could someone explain me where should I use them?.Is there any rule about it?
Example: Thomas from the accounting dep. helped us OUT with the document.
Example: I think you are the right person to help them OUT.
Sorry I can't remember any example with UP right now.