1. 泛指一般意义的“安静”“沉默”，是不可数名词。如：
Silence means [gives] consent. 沉默意味着同意。
若表示一段沉默的时间，则是可数名词。如：
There was a long silence before he spoke again. 沉默了很久之后他才再次说话。
During the meeting there were many silences. 会议期间出现过好几次冷场。
2. 用于in silence，意为“默默地”，此时它是不可数的。如：
He left the room in silence. 他默默地离开了房间。
He waited there in silence. 他默默在那儿等着。
3. 口语中用 Silence! 表示请人安静，是一个十分正式的用法，通常用于法庭以及大型集会等正式场合，在一般情况下（在教室等）通常不用它，而用 Please be quiet.之类的。此时的 slilence 也不可数。
单词：silence的近义词、反义词、形近词辨析
loud/aloud/loudly/noise/noisy/voice/whisper/sound/silent/silence/quiet/quite/calm
记忆：
1. loud [ laud ] adj. 高声的, 不断的, 喧吵的 adv. 高声地 Speak louder, please. We can’t hear you.请说大声点，我们听不到你的话。
2. aloud [ E5laud ] adv. 大声地 In the morning we read aloud the text we have studied.早晨时我们朗读学过的课文。
3. loudly adv. 响亮地, 大声地 Someone is knocking at the door loudly. Go and see who it is.有人在大声敲门，去看看是谁。
4. noise [ nCiz ] n. 喧闹声, 噪声, 噪音 The noise made by the cutting machine made it impossible for me to fall asleep.切割机的声音使我睡不着。
5. noisy [ 5nCizi] adj. 吵杂的, 聒噪的 The boys are being noisy again. Go and tell them to be quiet!男孩们又在吵闹了，去叫他们安静些！
6. voice [ vCis ] n. 声音, 嗓音, 意见, 发言权 She has such a nice voice that her songs were sold very well though not perfectly musical.她嗓子很好，尽管她的歌不那么富有音乐感，但是还是销售得不错。
7. whisper [ 5(h)wispE ] n. 耳语, 私语, 密谈, 飒飒的声音 vi. 耳语, 密谈, 飒飒地响 vt. 低声说 Listen! They are whispering next door!听！他们在隔壁窃窃私语！
8. sound [ saund ] n. 声音 adj. 健全的 adv. 彻底地, 充分地 vi.发出声音 vt.使发声 Not a single sound can be heard. What a deadly silent night!一丁点声音都听不到。多么可怕的寂静夜晚！
9. silent [ 5sailEnt ] adj. 寂静的, 沉默 Everything was silent. The battle was over一.片寂静。战事结束了。 格言： Beware of a silent dog and still water. 提防不吠的狗, 小心 静止的水。
10. silence [ 5sailEns] n. 寂静, 沉默 The silence of everyone at the meeting nearly killed me! 会上每个人一言不发，我真难以忍受！ 格言：Silence is golden. 沉默是金。
11. quiet [ 5kwaiEt ] adj. 静止的, 宁静的, 从容的 vi.平静下来 Keep quiet while sitting the examination.考试时要保持安静。
12. quite [ kwait ] adv. 相当, 完全, 十分 The room is usually quite quiet at night.晚上时房间常很安静。
13. calm [ kB:m ] adj. (天气、海洋等)静的, 平静的, 镇静的, 沉着的 v. (使)平静, (使)镇定, 平息 Facing the deadly snake, the girl kept calm. She stayed still, waiting for it to pass by.女孩面对致命的毒蛇镇静自若。她呆着没动，等着它过去。
14. still [ stil ] adj. 静止的 adv. 还, 仍 The day has completely broken. They still stay in bed still.大天亮了，他们还在床上不起来。
另类阅读：
No loud voice, please. I will read aloud a beautiful passage for you, so please keep quiet and don’t make the room noisy. What? Someone is knocking on the door loudly? Stay still. You should have been silent. The noise you made must have affected the neighboring classes. Keep calm. I will apologize to them.
与单词：silence 相关的例句或者名人名言
It's better to maintain silence when you do not know what to say.
不知道该说什么的时候保持沉默就好。
The tense silence was punctuated by bursts of gunfire.
紧张的寂静不时为一阵阵的炮火声所打破。
He had relapsed into silence again.
他再一次陷入沉默。
Now and then a bird's song broke in upon the silence of the wood.
鸟鸣声不时打破林中的寂静。
※Speech is silver (or silvern), silence is golden. 雄辩是银，沈默是金。
