should/would think＋that从句

A —Will it be expensive？
  —I should／would think so．／I should think it would．I shouldn’t think it would．／I shouldn’t／wouldn’t think so．／I should／would think not．
  —这个会很贵吗？ 
  —我想是的。／我想不。
回答这一类问题时，回答人暗示他并不确实知道，只是凭印象而言。 I should／would think 表示的语气没有I think那么肯定。 
should／would think引导一个附加评论时，一般不能用so／ not。这时必须使用that从句： 
  —He’s an astrologer， looking for work．
  —I shouldn’t／wouldn’t think that he’d find it easy to get work．
  —他是一个星相家，正在找工作。
  —我想他大概不会感到找到一份工作是容易的。 
B 如果评论发生在过去的动作，可以用should／would have thought： 
  —He actually got a job as an astrologer．
  —I shouldn’t／wouldn’t have thought that it was possibe to do that．
  —他真的以星相家的身份找了一份工作。
  —我本来认为那是不可能的。 
C should／would have expected＋不定式结构／that从句也是可行的。有时非人称代词you可代替I： 
  —She has emigrated．
  —Has she？ You’d／I’d have expected her to stay in this country．
  —她移居国外了。
  —是吗？人们／我还以为她会留在国内的。