1. 表示“保持”，用作連系動(dòng)詞，其后可接形容詞或介詞短語等作表語。如：
She knew she must keep calm. 她知道她必須保持冷靜。
We’ll keep in touch with you. 我們將和你保持聯(lián)系。
2. 表示“保持”，用作實(shí)義動(dòng)詞，其后可接動(dòng)名詞作賓語，但不能接不定式。如：
Prices keep rising. 物價(jià)不斷上漲。
Please don’t keep running up and down the stairs. 請別老在樓梯上跑上跑下。
根據(jù)語義的需要，其后可接帶形容詞、副詞、介詞短語、現(xiàn)在分詞、過去分詞等的復(fù)合結(jié)構(gòu)，但不能接帶不定式的復(fù)合結(jié)構(gòu)。如：
You must keep it a secret. 這事你得保密。
Sorry to have kept you up so late. 對不起讓你這么晚都沒睡。
A cold kept him in bed for three days. 一次感冒讓他臥床3天。
She kept us waiting for a long time. 她讓我們等了很久。
She advised that we should keep the gate locked. 她忠告我們要把門鎖好。
3. 比較keep doing sth與keep on doing sth：兩者均可表示反復(fù)發(fā)生的動(dòng)作（即動(dòng)作之間略有間隔）。如：
They kept (on) talking about it. 他們一直在談?wù)摯耸隆?span lang="EN-US">
但是，如果表示持續(xù)的狀態(tài)或連續(xù)不斷的動(dòng)作（動(dòng)作之間沒有間隔）時(shí)，通常只用keep doing sth。如：
He kept standing during the meeting. 開會(huì)時(shí)他一直站著。
另外，表示將一直在做的事繼續(xù)做下去，通常只用 keep on doing。如：
He kept on working after dark. 天黑了我們還繼續(xù)干。
Don’t give up; keep on trying. 別灰心，繼續(xù)努力。
4. 比較keep doing sth與keep from doing sth：前者指不停地做某事，后者指克制自己不做某事。如：
I could hardly keep from laughing. 我簡直忍不住大笑起來。
I hope you will keep from doing anything rash. 我希望你不要魯莽行事。
5. 比較keep sb doing sth與keep sb from doing sth：前者指使某人不停地做某事，后者指使某人不做某事。如：
The snow kept us from going out. 下雪使我們沒法出去。
He hung around for hours and, which was worse, kept me from doing my work. 他閑待了好幾個(gè)鐘頭，更糟糕的是，這使我也沒法工作。
作動(dòng)詞
keep，過去式和過去分詞 kept
1. keep = to continue to have 保有；保存；保留
Keep medicines in a locked cupboard
(= store them there).
將藥存放在上鎖的櫥柜里。
歷年真題：
閱讀（2015年5月）
The detectors were installed to keep weapon out of schools，but the scanners（掃描器）can also detect cell phones.
譯文：安裝探測器是為了保證武器不進(jìn)入校園，但掃描器也可以檢測到手機(jī)。
2. keep=care for 照顧，照看（某人的孩子）
Jody will keep the children while I shop.
我去買東西時(shí)，喬迪會(huì)照看孩子。
3. keep your promise/word 履行諾言
I made a promise to you and I intend to keep it.我向你作過承諾，我會(huì)履行的。
4. keep an appointment 守約
She phoned to say she couldn't keep her appointment.
她打電話說她無法守約了。
5. keep a diary, an account, a record, etc.
記日記／記賬／作記錄（等等）
I've kept a diary for twelve years now.到現(xiàn)在我記日記已有12年了。
6. keep a secret 保守秘密
7. keep time （表或鐘）準(zhǔn)時(shí)Does your watch keep good time?你的表準(zhǔn)嗎？
8. keep=to stay （使）留在（某處）；（使）保持（某狀態(tài)）
I wish you'd keep quiet.
我希望你能保持安靜。
I like to keep busy.
我喜歡一直忙忙碌碌的。Keep left (= stay on the road to the left) at the traffic lights.
到紅綠燈處走左邊的路。
Can you keep the dog outside, please?
你能讓狗呆在外面嗎？
Close the door to keep the room warm.
關(guān)上門讓房間保持暖和。、
9. keep (on)= to continue doing something
繼續(xù)（做）；重復(fù)（做）
He keeps trying to distract me.
他一直想分散我的注意力。
I keep on thinking I've seen her before somewhere.
我一直覺得以前在哪兒見過她。
歷年真題：
Jarden and the zinc industry are fighting to keep the penny. Since 2006, Jarden has given $1.2 million to Americans for Common Cents (ACC). The group's mission is to keep the penny in use.
譯文：“加登”和鋅行業(yè)都在為繼續(xù)使用1分硬幣而努力。自從2006以來，“加登"已經(jīng)給了”普通美分支持者“（簡稱ACC）組織了120萬美元。這個(gè)組織的使命就是使1分硬幣繼續(xù)流通。
10. keep=to delay someone or prevent them from doing something 使耽誤；阻止，妨礙I'm so sorry to keep you waiting.
很抱歉，讓你久等了。
11. keep=to stay fresh and in good condition
�。ㄊ澄铮┍３中迈r，持久不壞
Milk keeps much longer in a fridge.
牛奶放在冰箱里保鮮時(shí)間會(huì)長很多。