●用法拓展
注意该结构和if/unless条件状语从句以及非谓语动词作状语的转换。
①Work harder and/then you will succeed in your studies.
=If you work harder, you'll succeed in your studies.
=Working harder, you will succeed in your studies.
如果你更加努力学习,在学习上你就会成功。
②Study hard, or/otherwise you'll fail in your exams.
=If you don't study hard, you'll fail in your exams.
=You will fail in your exams unless you study hard.
如果你不刻苦学习,你就会考试不及格。即境活用单项填空
Follow your doctor's advice, ________ your cough will get worse.
A.orB.and
C.then
D.so
答案:A
知 能 层 层 练
一、单项填空
1.We________to paint the house at dawn but finished only the front part till dark.
A.set out
B.set off
C.set about
D.set aside
答案:A
解析:set out to do sth.“开始做某事”,相当于begin to do sth.。
2.I tried phoning Maggie's office in the morning,but I couldn't________.
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