2013年12月英语六级写作冠词用法9

2013年12月英语六级写作冠词用法9

2013年12月英语六级写作冠词用法9

破折号(Dash)

　　主要用于：

　　a) 注释性的词语或句子前;如用于句子中间，前后都要有破折号。例如：

　　There is a way to decide any question — experiment.

　　Somewhere or other — I think it is in the preface to Saint Joan — Bernard Shaw remarks that we are more gullible and superstitious today than we were in the Middle Ages.

　　b) 补充性的成分。例如：

　　Life — and death, too — is a cycle that goes round and round. I teach because teaching is a profession built on change. When the material is the same, I change — and more important, my students change.

　　c) 总括所列举的事物。例如：

　　The complex operation required new methods for directing the combined endeavors of thousands and thousands of minds, some in government, some in universities, some in private industry — all working together for a common purpose.

　　d) 突然转折。例如：

　　One little problem is that a computer can’t laugh yet — but the scientists are working on it.