28.　 看到有人插对你可以说：Sorry, would you mind joining the line?　

常见动名词、分词的习惯用法总结　

使用-ing分词的几种情况　

27.　 看到有人乱丢垃圾你可以说：Would you mind picking it up?　

26.　 看到有人抽烟你可以说：Could you please put out that cigarette?　

25.　 People don’t usually like to be criticized, so we have to be careful how we do this. 　

24.　 In fact, we should also take care not to cough or sneeze loudly in public if possible.　

23.　 This may seem like a difficult word at first, but it can be very useful to understand.　

22.　 Etiquette means normal and polite social behavior.　

21.　 We might want to ask someone to behave more politely if we see them breaking a rule of etiquette.　

20.　 Sometimes, rules of etiquette are the same almost everywhere.　

19.　 The way people behave is different in different cultures and situations.