用介詞in造句三年級(jí)英語(yǔ)

The library is in silence now.
in silence 英[in ?sail?ns] 美[?n ?sa?l?ns]
[詞典] 安靜地，無(wú)聲地;
[例句]They walked on in silence for a while
他們繼續(xù)默默無(wú)語(yǔ)地走了一會(huì)兒。

play a role in 有兩中意思：a. “在......中扮演角色” eg: He played an important role in the film Julia.b. “在......中發(fā)揮作用” eg: Telephones are playing an important role in our daily life.

I join them in the party.我加入他們的聚會(huì).
They joined the this company in 2011.他們?cè)?011年進(jìn)入公司（工作）.
We all joined in the dancing.我們都在一起跳舞.

Deutschland

如果你滲升沒(méi)有具體要說(shuō)哪年的夏天神散，那用in summer 就可以了
但是如果要說(shuō)游喊氏1992年的夏天，那就用 In the summer of year 1992,

原句是 Going to bed and waking up at a regular time every day could aid in dream recollection.
就是說(shuō)：每天有規(guī)律地睡覺(jué)和起床可以幫助你回憶起你的夢(mèng)。

aid in xxx的意思是在xxx方面有幫助
recollection是回憶
aid in dream recollection 也就是在回憶夢(mèng)方面有幫助

希望能幫到你！

The students draw pictures in the art room_
美術(shù)室畫畫

in case 萬(wàn)一。是連詞，引導(dǎo)條件狀語(yǔ)從句。也就是說(shuō)in case后面是一個(gè)完整的句子。例句：1、Take a hat with you in case the sun is very hot.倘若太陽(yáng)很利害，你就把帽子戴上。2、 In case you need something, please don't hesitate to let me know.
如果你需要什么東西，請(qǐng)不客氣地對(duì)我說(shuō)。
3、It may rain you'd better take an umbrella (just) in case (it does).
可能下雨--你最好帶把傘, 以防萬(wàn)一（下起來(lái)）.
in case of 意思和in case差不多，萬(wàn)一的意思，但是其中of是介詞，介詞后面只能帶名詞性質(zhì)的詞，比如名詞、代詞等。例句：1、In case of rain they can't go.萬(wàn)一下雨，他們就不能去了。2、 We have an auxiliary generator in case of power cuts.
我們有一臺(tái)萬(wàn)一斷電時(shí)使用的備用發(fā)電機(jī)。
3、 The doctor asked us to call him during the night except in case of necessity.
醫(yī)生吩咐我們，除非必須，否則不要在夜里叫他。