【问】 《现代英语用法词典》(P.4767)将I should have thought译为“我会以为”.并举出了下列例句：
 Is she only thirty-five? I should have thought she was much older. (Chambers)
 看来，用“我会以为”来翻译I should have thought是行不通的。这是为什么呢?
 【答】 I should have thought有时具有这样的含义：我原来以为如何如何，但我错了。但是有时也表示惊讶或批评：
 1. 20 degrees? I should have thought it was colder than that if you hadn't told me.(LDCE)
 20度?如果你没有告诉我的话，我还以为气温比这低呢。
 2. I should have thought he could have washed his hands，at least. (PEU)
 我本来以为他至少能把自己的手洗洗。
 你提问的句子似可译为：
 她才35岁吗?我原来以为她的年纪比这大多了。
 should not+完成体不定式表示“本不应该做某事，而实际上却做了”的意思：
 1. You should not have gone up to college so soon.(But you did)
 你本不应该这么早就上大学的。
 2. They shouldn’t have come. (Wilde)
 他们本不应该来。
 ought to也可以用于此种结构，但没有should用得普遍(参见ought to have done)。
 请做下面的英语试题：
 1. “When should I get my tickets?”
 “You____your tickets last month”
 A. should get B. had got C. should have gotten D. ought to get
 2. “Did Bob do his homework?” “No，but he____. ”
 A. had B. have
 C. should have D. did(TOEFL，75.11)
 3. “You ought to have gone to see your uncle yesterday. ”
 “Yes，I____. ”
 A. should B. ought to
 C. would to D. should have