chairs
These are many chairs . 2020/7/26
名词单数变复数的规则 1：
• 一般直接加s
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box
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This is a box .
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boxes
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These are many boxes .
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man—men woman—women foot—feet tooth（牙）—teeth goose[guːs]（鹅）—geese child—children ox[ɒːks]（公牛）—oxen等
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知识延伸：
名词单数变复数的规则5：
2. 1.以辅音＋y结尾的名词，要把y变成i，再加es .
名词单数变复数的规则 3： 以o结尾的名词，有生命的加es，无生命的加s
．但个别有生命的却加s．如：
1.negro(黑人)，hero（英雄），potato(土 豆)，tomato（西红柿）后加es； 2.radio(收音机)photo(照片)后加s； 3.特殊的kangaroo后加s .
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小结：名词单数变复数的规则
1.一般直接加s 2.以s,x,sh,ch结尾的可数名词的复数形式通 常在其后加es.如class,bus,fox,dish,watch 等。 3.以o结尾的名词，有生命的加es，无生命的 加s．但个别有生命的却加s．如： （1）.negro(黑人)，hero（英雄）， potato(土豆)，tomato（西红柿）后加es； （2）.radio(收音机)photo(照片)后加s； （3）.特殊的kangaroo后加s .
Lesson 12 How many are
there ?
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pencils
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These are many pencils . 2020/7/26
chair
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This is a chair .
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3. 如：baby—babies . family—families .
2.以元音＋y结尾的名词，要直接加s ．如：boy—boys .
2. 3.以 f 或 fe结尾的，要去掉f或fe ,再加ves .
3. 如：wolf—wolves , leaf—leaves ，wife—wives， knife— knives.
potatoes
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These are many potatoes
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photo
photo
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photo
This is a photo.
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photos
2020/7/26ຫໍສະໝຸດ These are many photos.
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一、
看图写单词.
1. These are _c_h_il_d_re_n_. 2. There are five __p_e_n_c_il_s_. 3. Here are many d_r_e_s_s_e_s_.
4. These are _w_o_m__e_n_.
5. Here are some _s_t_a_m_p_s_.
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tomato
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This is a tomato . 2020/7/26
tomatoes
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These are many tomatoes.
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potato
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This is a potato .
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8.有一些单词变复数时改变其中的字母或词尾发生变化， 如：man—men woman—women foot—feet tooth（牙）—teeth goose[guːs]（鹅）—geese child—children ox[ɒːks]（公牛）—oxen等
9.fish很特殊： fish用作可数名词指“鱼的条数”时单数和复数形式相 同（two fish两条鱼）。 fish指“鱼的种类”时复数形式才为fishes（two fishes两种鱼）。 fish用作不可数名词时无复数形式，意为“鱼肉”， Help yourself to some fish．随便吃些鱼。）
man
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These are men
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woman
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These are women
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This is a child
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These are children
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名词单数变复数的规则4：
有一些单词变复数时改变其中的字母或词尾 发生变化，如
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2.4.以辅音＋y结尾的名词，要把y变成i，再加es. 3. 如：baby—babies ，family—families . 4.5.以元音＋y结尾的名词，要直接加s． 5. 如：boy—boys . 6.6.以f或fe结尾的，要去掉f或fe ,再加ves. 7. 如：wolf—wolves , leaf—leaves ， wifewife—wives ， knife—knives. 8.7.单复数同形。 9. 如：sheep—sheep(绵羊), deer—deer（小 鹿）鹿）, 2020/7/26 people-—people,Chinese—
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6. Here are three __b_u_s_e_s__. 7. These are ___m__e_n__.
二．改错：
1．This is one pencils . (pencil) 2. Look at these woman. (women ) 3 . There are five childs . (children) 4. There is many dishes. (are) 5. How much pencils are there? (many) 6. How many book do you have? (books) 7. The students is reading books now. (are)
bus
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This is a bus .
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buses
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These are three buses
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名词单数变复数的规则 2：
以s,x,sh,ch结尾的可数名词 的复数形式通常在其后加es. 如class,bus,fox,dish,watch 等
三．改写句子：
1．This is a pencil. (复数) These are pencils.
2. Here is a dish . (复数) Here are dishes.
3. These are some bedrooms . (单数) This is a bedroom.
4. Here are two women . (单数) Here is a woman.
4.单复数同形。
2. 如：sheep—sheep(绵羊), deer—deer（小鹿）,
3.
people-—people,Chinese—Chinese等
5.fish很特殊，fish用作可数名词指“鱼的条 数”时单数和复数形式相同（two fish两条 鱼），指“鱼的种类”时复数形式才为 fishes（two fishes两种鱼）；fish用作不可 数名词时无复数形式，意为“鱼肉”， Help yourself to some fish．随便吃些鱼。 ）