2. 观察下列句子,你能总结keep的用法吗?
We need to do more exercise to keep fit.
我们需要多做运动保持健康。
All these things that the government does are to keep the air fresh.
政府做的所有这些事情都是为了保持空气清新。
Nobody knew why she kept us waiting for a long time.
没人知道为什么她让我们等了那么久。
Most parents keep their children from playing with mobile phones for too long.
大部分父母不让孩子长时间玩手机。
Could you tell me how long I can keep these books?
您能告诉我这些书我可以借阅多久吗?
I ask my mother if I can keep a dog as a pet.我问妈妈是否可以养一只狗当宠物。
总结:

keep相关短语拓展:

|keep away from|We should keep away from junk food.我们应该远离垃圾食品。|⑤|
| ---- | ---- | ---- |
|keep in touch with|I always keep in touch with my old friends.我一直和老朋友保持联络。|与……保持联系|
|keep in mind|Keep your goals in mind when facing difficulties.面对困难时要牢记你的目标。|⑥|
|keep up with|I'm trying my best to keep up with my classmates in English learning.我正在尽最大努力在英语学习上跟上同学们。|跟上|
|keep an eye on|The teacher asked me to keep an eye on the new student in our class.老师让我留意班上的新同学。|留意|
【即学即练】根据上下文,用方框中所给单词或词组的适当形式填空。
keep an eye on keep away from keep keep in mind keep up with
In my daily life, I always try to keep a positive attitude. When I'm doing my homework, I'd like (1) myself focused by turning off my phone to avoid distractions(分心). I am used to reading for at least half an hour every day, which helps me (2) different knowledge. During weekends, I like to do some housework. Last Sunday, I helped my parents in the kitchen. I (3) the food while it was cooking to make sure it wouldn't get burnt. And I always (4) the importance of protecting the environment, so I never litter. In short, (5) bad habits and being careful in different aspects(方面) make my life more organized and enjoyable.
Keys

总结部分：
① 使……处于某种状态；阻止
② keep sb. doing sth.
③ keep sb. from doing sth.
④ 饲养
短语拓展：
⑤ 远离
⑥ 牢记；记住
即学即练：
(1) to keep
(2) keep up with
(3) kept an eye on
(4) keep in mind
(5) Keeping away from

一、keep的用法总结：
1. 系动词：后接形容词，表“保持（某种状态）”，结构为`keep +adj.`；
2. 实义动词：
① 使……处于某种状态；阻止
② `keep sb. doing sth.`：表“让某人一直做某事”，对应例句`she kept us waiting`；
③ `keep sb. from doing sth.`：表“阻止某人做某事”，对应例句`keep their children from playing`；
④ 饲养：对应例句`keep a dog as a pet`，结构为`keep+sth.`。
二、短语拓展：
⑤ `keep away from`意为“远离”；⑥ `keep in mind`意为“牢记；记住”。
三、即学即练：
(1) `would like`后接动词不定式，`keep sb.+adj.`表“使某人保持某种状态”，故填`to keep`；
(2) 结合语境，阅读帮助“我”跟进各类知识，`keep up with`表“跟上”，`help`后接动词原形，故填`keep up with`；
(3) 根据`Last Sunday`可知用一般过去时，`keep an eye on`表“留意”，过去式为`kept an eye on`；
(4) 根据`always`可知用一般现在时，`keep in mind`表“牢记”，主语为I，故填`keep in mind`；
(5) 此处与`being careful`并列作主语，需用动名词形式，`keep away from`表“远离”，故填`Keeping away from`。