内容正文:
四年级上册英语Unit 2 My friends 核心语法精讲精练
一、单元核心语法精讲
本单元围绕介绍、描述朋友(外貌、性格、特征)核心主题,核心语法为人物特征描述句型(be动词用法、形容词用法、核心问答句型),是本单元唯一必考核心考点,侧重日常口语描述和句型运用。
1.核心语法:be动词(am/is)描述人物特征
本单元全程用一般现在时描述人物固定特征(长相、高矮、胖瘦、性格等),核心依托am/is两个be动词,适配单人、自我介绍场景。
(1)基础核心结构(必背)
自我介绍:I am + 形容词(我是……的)
描述他人:He/She/单数人名 + is + 形容词(他/她是……的)
核心说明:本单元仅涉及单数主语用法,无复数考点,降低学习难度,重点区分I和He/She对应的be动词。
经典例句:I am tall.(我很高。) She is thin.(她很瘦。) He is friendly.(他很友好。)
2.单元核心描述形容词(必考词汇)
所有形容词直接搭配be动词使用,无特殊变形,是描述人物的核心词汇,必须熟记:
外貌类:tall(高的)、short(矮的;短的)、fat(胖的)、thin(瘦的)、long(长的)、short(短的)
性格类:friendly(友好的)、quiet(安静的)
其他特征:strong(强壮的)
3.核心问答句型(单元高频考点)
(1)询问人物外貌/性格
句型:What’s he/she like? 他/她怎么样?(询问长相、性格)
回答:He/She is + 形容词.
例句:—What’s she like? —She is quiet.(她很安静。)
(2)一般疑问句及简答
句型:Is he/she + 形容词? 他/她是……的吗?
肯定回答:Yes, he/she is. 否定回答:No, he/she isn’t.
例句:—Is he strong? —Yes, he is.(是的,他很强壮。)
4.单元核心易错点
1.主语搭配固定:I 只能配 am,He/She 只能配 is,绝对不能混搭。
2.short 双含义:可形容身高“矮的”,也可形容头发“短的”,对应反义词分别是 tall(高的)、long(长的)。
3.问答一致性:问句用he,回答必须用he;问句用she,回答必须用she,不可混淆性别。
二、语法专项精练
题型一:用be动词am/is填空(每空2分,共20分)
根据主语搭配规则,填入正确的be动词。
1.I ______ tall.
2.She ______ thin.
3.He ______ strong.
4.I ______ friendly.
5.Amy ______ quiet.
6.Tom ______ short.
7.I ______ not fat.
8.She ______ not tall.
9.He ______ kind.
10.Lucy ______ helpful.
题型二:单项选择(每题3分,共30分)
选出最符合语法规则的正确选项。
( )1. ______ you tall?
A. Am B. Is C. Are
( )2. She is ______. She is not noisy.
A. quiet B. tall C. strong
( )3. —What’s he like? —______
A. He is tall. B. He likes apples. C. I am tall.
( )4. He ______ thin. He is fat.
A. is B. isn’t C. am not
( )5. I ______ strong.
A. am B. is C. are
( )6. —Is she friendly? —______
A. Yes, she is. B. Yes, he is. C. No, she don’t.
( )7. My friend ______ short hair.
A. is B. has C. have
( )8. —______ is your friend? —Lily.
A. What B. Who C. Where
( )9. Tom ______ very friendly.
A. am B. is C. are
( )10. Her hair is ______, not short.
A. long B. tall C. thin
题型三:句型转换(每空3分,共30分)
按要求改写句子,每空一词。
1. I am quiet.(改为一般疑问句)
______ ______ quiet?
2. She is tall.(改为否定句)
She ______ ______ tall.
3. He is strong.(对划线部分提问)
______ ______ he ______?
4. Is she friendly?(肯定回答)
______, she ______.
5. Tom is short.(改为一般疑问句)
______ Tom short?
题型四:连词成句(每题4分,共20分)
根据单元语法句型,组成通顺正确的句子。
1. is / she / friendly (.)
2. am / I / tall (.)
3. he / strong / is (.)
4. like / what / she / is (?)
5. quiet / is / my / friend (.)
参考答案
题型一:用be动词am/is填空
1.am 2.is 3.is 4.am 5.is 6.is 7.am 8.is 9.is 10.is
题型二:单项选择
1.C 2.A 3.A 4.B 5.A 6.A 7.B 8.B 9.B 10.A
题型三:句型转换
1.Are you
2.is not
3.What is; like
4.Yes; is
5.Is
题型四:连词成句
1. She is friendly.
2. I am tall.
3. He is strong.
4. What is she like?
5. My friend is quiet.
学科网(北京)股份有限公司
$