favorite sport

　　沈阳牛津英语四年级下册Unit 6的学习重点，聚焦单元核心词汇与句型结构，八篇专项练习（每篇5题，共40道），题型围绕同义句转换中的适当形式选择，覆盖名词、动词、形容词等词性变化及常用句型替换。以下是完整练习及解析：

　　专项练习一

　　1. This is my book. → This book is ______. (I / my / mine)

　　2. She has a red pen. → The red pen is ______. (her / hers / she)

　　3. We like our school. → The school is ______. (we / our / ours)

　　4. Tom’s bag is blue. → The blue bag is ______. (Tom / Tom’s / Toms’)

　　5. They have some toys. → Some toys are ______. (their / theirs / them)

　　专项练习二

　　1. He is tall. → He is not ______. (short / long / small)

　　2. The desk is big. → The desk is not ______. (little / small / short)

　　3. This apple is sweet. → This apple is not ______. (sour / salty / hot)

　　4. The rabbit is fast. → The rabbit is not ______. (slow / quick / fast)

　　5. That dress is new. → That dress is not ______. (old / young / new)

　　专项练习三

　　1. I have a pen. → I have ______ pen. (a / an / the)

　　2. She eats ______ orange every day. (a / an / the)

　　3. ______ sun is big and bright. (A / An / The)

　　4. There is ______ cat on the chair. (a / an / the)

　　5. He plays ______ piano well. (a / an / the)

　　专项练习四

　　1. He runs fast. → He is a ______ runner. (fast / slowly / quick)

　　2. She sings beautifully. → She is a ______ singer. (beautiful / beautifully / beauty)

　　3. They walk slowly. → They are ______ walkers. (slow / slowly / quick)

　　4. The boy writes carefully. → The boy is a ______ writer. (careful / carefully / care)

　　5. My mother cooks well. → My mother is a ______ cook. (good / well / better)

　　专项练习五

　　1. I like dogs. → Dogs are ______ favorite animals. (I / my / mine)

　　2. You have a nice bike. → The nice bike is ______. (you / your / yours)

　　3. He plays football every day. → Football is ______ favorite sport. (he / his / him)

　　4. She draws pictures well. → Drawing is ______ favorite hobby. (she / her / hers)

　　5. We watch TV in the evening. → Watching TV is ______ favorite activity. (we / our / ours)

　　专项练习六

　　1. This is Peter’s ruler. → This ruler ______ Peter. (belong to / belongs to / belonging to)

　　2. These books are Lily’s. → These books ______ Lily. (belong to / belongs to / belonged to)

　　3. The toy car is Tom’s. → The toy car ______ Tom. (is / are / belong to)

　　4. That bag is Lucy’s. → That bag ______ Lucy. (belong / belongs to / is to)

　　5. Those pencils are Mike’s. → Those pencils ______ Mike. (are / belong to / is)

　　专项练习七

　　1. The red ball is mine. → The red ball is ______. (my / I / my ball)

　　2. Her dress is pink. → The pink dress is ______. (she / hers / her dress)

　　3. Our classroom is big. → The big classroom is ______. (we / ours / our)

　　4. Their toys are on the desk. → The toys on the desk are ______. (they / their / theirs)

　　5. His pen is black. → The black pen is ______. (he / his / him)

　　专项练习八

　　1. It’s a cold day. → The day is ______. (cold / hot / warm)

　　2. This is an easy question. → This question is ______. (hard / easy / difficult)

　　3. He is a strong boy. → The boy is ______. (weak / strong / thin)

　　4. That is a happy girl. → The girl is ______. (sad / happy / angry)

　　5. This is a heavy box. → The box is ______. (light / heavy / small)

　　参考答案及解析

　　专项练习一答案：1. mine 2. hers 3. ours 4. Tom’s 5. theirs

　　- 解析：本题考查名词性物主代词的用法。名词性物主代词（mine, hers, ours, theirs）相当于“形容词性物主代词+名词”，后面不接名词，符合“主语+be+名词性物主代词”的同义句结构。Tom’s为名词所有格，直接表示“汤姆的”，对应原句“Tom’s bag”。

　　专项练习二答案：1. short 2. small 3. sour 4. slow 5. old

　　- 解析：本题考查形容词反义词转换。原句为肯定句，同义句通过“is not+反义词”实现转换，需匹配单元核心形容词的反义词：tall（高的）→short（矮的），big（大的）→small（小的），sweet（甜的）→sour（酸的），fast（快的）→slow（慢的），new（新的）→old（旧的）。

　　专项练习三答案：1. a 2. an 3. The 4. a 5. the

　　- 解析：本题考查冠词用法。不定冠词a用于辅音音素开头的单词前（pen），an用于元音音素开头的单词前（orange）；定冠词the用于独一无二的事物（sun）和乐器前（piano），符合单元中冠词的核心知识点。

　　专项练习四答案：1. fast 2. beautiful 3. slow 4. careful 5. good

　　- 解析：本题考查形容词与副词的转换。原句用副词（fast, beautifully, slowly等）修饰动词，同义句用形容词修饰名词（runner, singer等），需注意词性转换：beautifully（副词）→beautiful（形容词），carefully（副词）→careful（形容词），well（副词，修饰动词）→good（形容词，修饰名词）。

　　专项练习五答案：1. my 2. yours 3. his 4. her 5. our

　　- 解析：本题考查形容词性物主代词与名词性物主代词的转换。原句“like/have+名词”，同义句“名词+be+one’s favorite+名词”，形容词性物主代词（my, your, his等）后接名词（favorite animals），名词性物主代词（yours, ours）单独使用，对应原句“your bike”“our TV”。

　　专项练习六答案：1. belongs to 2. belong to 3. is 4. belongs to 5. belong to

　　- 解析：本题考查“名词所有格”与“belong to”的同义转换。“sb.’s+名词”可转换为“名词+belong to+sb.”，主语为单数时（this ruler, the toy car），belong用第三人称单数形式belongs to；主语为复数时（these books, those pencils），belong用原形。第3题用“is”直接对应“Tom’s”，符合简单同义句转换规则。

　　专项练习七答案：1. my ball 2. hers 3. ours 4. theirs 5. his

　　- 解析：本题考查名词性物主代词与“形容词性物主代词+名词”的互换。mine=my ball，hers=her dress，ours=our classroom，直接对应原句结构，同时巩固名词性物主代词的替代用法。

　　专项练习八答案：1. cold 2. easy 3. strong 4. happy 5. heavy

　　- 解析：本题考查同义句的简单转换。原句“it’s+a/an+形容词+名词”与“the+名词+is+形容词”为单元核心同义句型，只需保持形容词一致，无需词性变化，重点考查句型结构的灵活运用。