It's funny that sometimes it is the simple concepts that proves difficult for learners of English.
For example how would you say in English it's time to finish work or finish what you are doing?
You may know one or two expressions already-which is good, but there are a few more expressions you may not have learned from your textbooks.
Chris and Yang Li are here to lend a helping hand to Goldfish who sent us this very question.
If you want a question answered too, just send it to questions.chinaelt@bbc.co.uk