Day4 L21 Mad or not

day4 Lesson21 Mad or Not 1. 单词和短语 mad [mæd] a.发疯. go mad=become crazy 变疯 come into use 使用某物 reason n.原因. for some reason 由于某种原因 sum n.量 动词短语 sum up 总结，概括 a large sum of +不可数名词 a lot of +可数/不可数 a great many +可数名词复数 a large number of +可数名词复数 the number of +可数名词复数 （强调数量是多少，谓语动词用单数。） determined a.坚定的，下决心的。 be determined to do sth.下定决心做某事 make up one’s mind to do sth. 下决心做某事 decide to do 决定做某事 change one’s mind 改变某人的注意 drive sb.mad= make sb.feel crazy. 逼疯某人 2. 句型 I was offered a large sum of money to go away. That little boy is slowly driving me mad. With the help of two dogs, he drove the sheep down the mountain. 在两只牧羊犬的帮助下，他把羊赶到了山下。 The businessman went mad and killed himself. For some reason he is determined to leave. I have to spend a large sum of money to get it back. 为了把它弄回来，我不得不花一大笔钱。 Please sum up what you said just now. 请总结一下你刚才说的话。 There are a large number of students in our school. The number of boys in our school is 1500. Homework: 1.单词短语抄写四遍，句子一遍 2背诵课文，完成同步练习