撇号
用撇号来形成所有格。(略)
可用撇号来指代缩写中被省去的字母。如:I'm, doesn't rock' n'roll, it's(意为it is,不要和带刺its混淆了)。缩写是非正式用语,在新闻报道中只在恰当的语境中使用。
用撇号还可以表示省略的数字,如:the celebration of’ 90, the' 20s(在s前不需要撇号);也可以用撇号构成耽搁字母的复数形式:“She made 3 A‘s and 2 B's on her report card.” “The Oakland A's won the World Series.”
不要再多字母的复数中或数字的复数中使用撇号,如:“This is the section for VIPs.” "The company ordered new 747s."