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30 天早背晚练——初中英语语法强基训练计划
Day 8： 一般现在时：三单变化规则及频度副词位置
一、时态的核心功能
1.经常性、习惯性的动作或存在的状态。 (I usually get up at 7:00.)
2.客观真理、科学事实及格言。 (The earth goes around the sun.)
二、“三单”变化规则（重点：动词的形态切换）
当主语是第三人称单数（He, She, It, 单个的人/物/不可数名词）时，谓语动词须加 -s 或 -es。
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变化规则 具体规律 例句
一般情况 直接加 -s like → likes; play → plays
s, x, ch, sh 结尾 加 -es watch → watches; finish → finishes
o 结尾 加 -es go → goes; do → does
辅音字母 + y 结尾 变 y 为 i 再加 -es study → studies; fly → flies
特殊变化 助动词/系动词 have → has; be → is
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三、频度副词的位置（难点：避开语感陷阱）
1.频度副词（always, usually, often, sometimes, never 等）用来表示动作发生的频率。
2.核心口诀：“行前系、助、情后”。
行前： 放在行为动词之前。 (He always helps others.)
系、助、情后： 放在 be 动词 (am/is/are)、助动词 (do/does) 或情态动词 (can/may) 之后。
He is often late for school.
You must never tell a lie.
四、句型转换“照妖镜”
1.否定句： 主语为三单时，借用助动词 doesn't，后续动词必须还原！
He likes fish. → He doesn't like fish. (切记：s 被 does 借走了)
2.疑问句： 句首加 Does，动词同样要还原。Does he like fish
五、避坑指南
1.技巧：找准“信号词”
看到以下词汇，大脑应自动切换至一般现在时模式：
Every... (every day/week), on Sundays, once a week, always, usually, often.
2.陷阱：复合不定代词
当主语是 Someone, Nobody, Everything 等复合不定代词时，谓语动词一律视为三单。
Nobody knows where he is.
3.陷阱：主语并列
My father and I watch (不加 s) TV. —— 两人为复数。
The teacher with her students watches (加 s) TV. —— 核心主语是 with 前面的 The teacher。
第 19 页 共 85 页
30 天早背晚练——初中英语语法强基训练计划
Day 8： 一般现在时：三单变化规则及频度副词位置【配套练习】
姓名： 日期： 分数：
一、考查三单拼写与基础应用【目标：准确识别主语人称，完成动词形态切换。】
1.(2024·江苏苏州)My father ________ to work by subway every morning to avoid traffic jams.
A. go B. goes C. went D. is going
2.(2024·四川成都)My grandfather ________ exercise every morning to keep healthy.
A. take B. takes C. is taking D. took
3.(2023·北京)—How often ________ your sister ________ the room —Twice a week.
A. do; clean B. does; clean C. does; cleans D. do; cleans
4.(2022·天津) Our teacher ________ (be) very patient with us.
5.(2024·模拟) The earth ________ (go) around the sun.
二、考查频度副词位置与否定还原【目标：掌握“行前系助情后”规则，识破助动词后的“动词还原”陷阱。】
6.(2024·上海)—How is your friend —He is very busy. He ________ has enough time for his hobbies.
A. always B. usually C. often D. seldom
7.(2023·广东) Tom ________ (not like) carrots, but he ________ (eat) them to stay healthy now.
8.(2022·山东) Li Hua is a polite boy. He ________ says "hello" to his teachers.
A. always B. never C. sometimes D. seldom
9.(2024·模拟)Mike is a good student. He ________ (be / never) late for class. (注意词序)
10.(2023·湖北)—Does your brother ________ a dog —No, he ________ a cat.
A. has; has B. have; has C. has; have D. have; have
11.(2021·江苏南京) I usually ________ (play) chess with my father on Sunday mornings.
三、主语一致性陷阱与综合语境【目标：处理复合不定代词、with/as well as 连接的复杂主语。】
12.(2024·模拟预测) Everyone in our class ________ (want) to join the English club.
13.(2023·河南) The teacher with her students ________ (visit) the museum every Monday.
14.(2022·浙江) Not only you but also he ________ (enjoy) listening to music.
15.(2020·黑龙江)—Who ________ (know) the answer to this question —I do.
16.(翻译) 他经常在空闲时间帮助他的妈妈做家务。 He often ________ his mother ________ housework in his spare time.
17.(翻译) 众所周知，光速比声速快。 As we all know, light ________ (travel) faster than sound.
18.(易错陷阱)My mother as well as my aunts ________ (wash) clothes on weekends.
第 20 页 共 85 页Day8.一般现在时：三单变化规则及频度副词位置参考答案与详解
第一部分解析
1.B |【解析】every morning 提示用一般现在时，My father 是三单，go 变 goes。
2.B |【解析】grandfather 是三单，take 变 takes。
3.B |【解析】还原陷阱！ 疑问句借用 does，后面的动词 clean 必须还原。
4.is |【解析】主语是 teacher，单数。
5.goes |【解析】客观真理用一般现在时，earth 是三单。
第二部分解析
6.D |【解析】语境逻辑：因为“很忙”，所以“很少”有时间。
7.doesn't like; eats |【解析】第一空否定用 doesn't + 还原；第二空肯定句主语三单加 s。
8.A |【解析】礼貌的孩子“总是”打招呼。
9.is never |【解析】词序原则： “系后”。频度副词放在 be 动词之后。
10.B |【解析】双重陷阱！ 问句用 Does...have (还原)；答句用 has (肯定三单)。
11.play |【解析】主语是 I，不是三单，动词用原形。
第三部分解析
12.wants |【解析】不定代词陷阱。 Everyone/Someone/Nobody 作主语，谓语动词一律用三单。
13.visits |【解析】主语一致性。 with 连接并列主语时，谓语动词由前面的 The teacher 决定。
14.enjoys |【解析】就近原则。 not only...but also... 谓语动词靠近谁就跟谁变，he 是三单。
15.knows |【解析】Who 询问身份且主语不明时，习惯上按三单处理。
16.helps; with |【解析】He 是三单，help 变 helps。
17.travels |【解析】客观事实，light 是不可数名词，视为三单。
18.washes |【解析】主语一致性。 as well as 连接主语，谓语看前面的 mother。es 结尾是因为 wash 以 sh 结
尾。

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