Three word expressions are common in English. Practicing themandusing them when you speak will help you sound more natural.Hereare several common expressions, along with an explanationandexample sentence.

　　black and white=something which is extremely clear(黑白分明的；绝对的)

　　He told her in black and white that she couldnt leave thehousewhile he was out.

　　dos and donts=the rules (行为准则，须知，注意事项)

　　There are various dos and donts about driving in the UK.

　　haves and have nots=people who are rich and those who arenot(富人和穷人)

　　In London you can find the haves and have nots ofthepopulation.

　　ins and outs=the details (细节，始末，详情)

　　I dont know the ins and outs of the situation, so I cantreallyadvise you.

　　kiss and tell=when someone sells a story of themselves andafamous person (泄漏秘密)

　　The British tabloids are famous for publishing kiss andtellstories.

　　odds and ends=small pieces of various items (零碎东西，零星杂物)

　　She made a stew with the odds and ends she found inthefridge.

　　Ps and Qs=manners (such as please and thank you) (言行)

　　Mind your Ps and Qs when you visit them!

　　pros and cons=advantages and disadvantages (赞成和反对)

　　There are a few pros and cons that we should considerbeforebuying a new house.

　　centers and wrongs=all the good points and bad points ofasituation (事情的真相、全部)

　　Regardless of the centers and wrongs of company policy, youneedto give a months notice.

　　tried and tested=something which has been welltested(经过反复考验的)

　　Using salt is a tried and tested way of getting red wine out ofacarpet.

　　ups and downs=good and bad periods following one anotherinturn(盛衰，沉浮)

　　They have a lot of ups and downs in their relationship.

　　back and forth=not to stay still, but to keep travelingbetweentwo places (来回地，反复地)

　　Im so glad Im moving. I was getting sick of going back andforthevery day. Now my fourney to work will be a lotquicker.(实习编辑:顾萍)