七年级英语encyclopaedia课件2

,In English, we can count some things, e.g., eggs, policemen, animals.We cannot count other things, e.g., air, water, music.We call nouns like eggs, policemen and animals countable nouns.We call nouns like air, water and music uncountable nouns.Most dictionaries use the letters C and U to tell if a noun is countable or uncountable.,A countable noun refers to something we can count. Here are some examples.,We use a or an before a singular countable noun. If the noun starts with a vowel sound, we use an.,3-1,To form the plural form of most countable nouns,we add -s to the singular form. However, there are some exceptions.,a cake cakes,a story stories,a glass glasses,a wish wishes,a watch watches,a box boxes,3-2,a potato potatoes,a radio radios,a mango mangoes,a shelf shelves,a knife knives,a man men,a woman women,a foot feet,a tooth teeth,a sheep sheep,a fish fish,a Chinese Chinese,a person people,3-3,An uncountable noun refers to something we cannot count. Here are some examples.,juice,Uncountable nouns cannot have plural forms.,2-1,We can also use some countable nouns + of before uncountable nouns to show their amounts.,a packet of salt,two cups of coffee,three bags of rice,four kilos of meat,six cartons of milk,2-2,A Read the sentences below and decide whether the nouns in italics are countable or uncountable. Make two lists in your notebook.,He saw a boy drinking water from a cup.They found a skeleton and some footprints in a cave.He used a pen and ink to draw his cartoons.Our dog eats meat, drinks milk and guards our house.,Countable nouns,Uncountable nouns,9-1,B Read these conversations and then work inpairs to make similar conversations about the pictures below. Use the words in the box to help you. Make them singular or plural as necessary. S1 (Timmy) asks the questions and S2 (June) answers. Then change parts and do the conversations again.,9-2,9-3,C Jane has invited six people to a party at herhome. Here is part of the shopping list that she wrote for the things she needs. Look at the picture and complete the list.,_ cartons of yogurt_ of cola_ jam_,1 bottle of milk,6 cans,2 jars of,1 bag of apples,3 packets of biscuits,9-4,D Rita, May and Danny are in a fast food restaurant. They each chose something from the menu on the right. Look at their pictures and complete the sentences with a(n) or some, and the names of the food and drinks. Put one word in each blank.,9-5,a hamburger,some chips,some coffee,9-6,a sandwich,a salad,some orange juice,9-7,some soup,a chicken leg,some rice,some cola,9-8,A5 Imagine that you went to the restaurant too. Work in pairs and tell each other what food you chose.,9-9,说 明本套教材根据牛津英语教材English First!，On Target!和Oxford English，由上海市中小学（幼儿园）课程改革委员会和牛津大学出版社