原因Fra bibliotek，for结果句
• 1. At the beginning, boxing was very cruel, for there were no rules and a prize fighter could be serious injured or even killed during a match. • 2. Mendoza did much to change the cruel prizefighting into a sport, for he brought science to the game.
句型：祈使句，and +将来时句
• • • • • Listen to me, and you will understand me. 句中and是并列连词，意思是：这样 Listen to me, or you won’t understand me. 句中or是并列连词，意思是：否则 练习：Study hard, and you will pass the exam.
并列连词for, and, or和but
并列连词
• 并列连词可以用来连接并列句。And连接顺向的 两个句子。 • My father is an engineer, and my mother is a teacher. • But引导转折意义的并列句。 • His mother is a famous English professor, but he is very poor at English. • Or表示非此即彼。You are an English teacher, or you are an English native speaker.