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—Are you a teacher? 你是老师吗？ —No, but I used to be. 我现在不是，但我过去是。 【注意事项】 不定式的完成式省略时一般保留to have，“情态动词＋动词完 成式”在省略中应保留have。 —You ought to have finished your work. 你早应该完成工作的。 —I know I should have/ought to have. 我知道我应该。 第17讲 │ 句型透视 However, during my first year at university, I was so busy studying and meeting new people that I did not write to my family as often as I should have. 然而，在读大学的第一年，我过分忙于学习和结交新朋友，以 至于没有经常给家里写信，其实我应该经常写信的。 第17讲 │ 句型透视 【活学活用】 In my opinion, life in the twentyfirst century is much easier than ________. A．that used to be B．it is used to C．it was used to D．it used to be [解析] D 第17讲 │ 句型透视 第17讲 │ 跟踪训练 跟踪训练 Ⅰ.单词拼写 1．The _________ (程序) for logging on to the network usually involves a password. 2．Most children’s television programmes aim to educate and e_______ at the same time. 3．He _________ (拥护) reducing military spending. 4．You might want to consider _________ (临时的) work until you decide what you want to do. 5．As the project leader, you will have to a _______ jobs to people. | 
