广东省增城市小楼中学八年级英语上册Module1AmazingthingsUnit2NumbersMorepractice(新版).ppt

* More practice Counting before numbers Brainstorming Before numbers, what did ancient people use to count things long time ago? Read the online article and then complete the flow chart about the development of counting methods. Counting before numbers 1 2 3 4 5 their fingers and even their toes small marks on sticks and bones tokens made from clay or small stones systems of written the Hindu-Arabic system Language points 1. Before the invention of written numbers, people used many different ways to count things.在文字数字发明之前，人们用很多不同的方式来算数 (1)invention n. “发明”；v.invent; n.inventor (2)count v. “计算，计数”。 (3)use…to do “用…来做某事”。 2. However, they could only count small numbers in this way.然而，他们仅仅以这种方式来算数目小的数。 (1)however “然而”；后面有逗号，同义词but后直接加内容。 (2)in this way “以这种方式”。 3. After that, they began to make small marks on sticks and bones.那以后，他们开始在棍子和石头上作小标记。 begin to do sth. “开始做某事”， 相当于begin doing sth. begin with…“以…开始” begin可与start互换。 4. This helped them count bigger numbers.这帮助他们计算更大的数目。 help sb.do sth.“帮助某人做某事”，动词不定式to常省略。 也可用help sb. with sth.;有时也可直接用help do sth. 5. They used them to count things like the ways of the month, the amount of food and the number of animals they had. 人们使用他们来算数，像月份的方式，他们拥有的食物的数量，动物的数目等 (1) the amount of “…的数量”后加不可数名词。 (2) the number of “…的数目”后加可数名词的复数形式。 6. Then people began to use tokens made from clay or small stones.然后人们开始使用用黏土或小石头制成的代币. (1) token “代币”；clay “黏土”。 (2) made from… 在这里是过去分词短语作后置定语。 7. They often put the tokens on pieces of string so that they could carry them around easily.人们经常把代币串在绳子上以便容易携带。 so that “以便”；另有用法so…that…“如此…以致…” 其中so 后加副词或形容词；that后加句子。 如：He was so angry that he could not say a word. *