一年级用in造句英语简单

The library is in silence now.
in silence 英[in ˈsailəns] 美[ɪn ˈsaɪləns]
[词典] 安静地，无声地;
[例句]They walked on in silence for a while
他们继续默默无语地走了一会儿。

play a role in 有两中意思：a. “在......中扮演角色” eg: He played an important role in the film Julia.b. “在......中发挥作用” eg: Telephones are playing an important role in our daily life.

I join them in the party.我加入他们的聚会.
They joined the this company in 2011.他们在2011年进入公司（工作）.
We all joined in the dancing.我们都在一起跳舞.

Deutschland

如果你渗升没有具体要说哪年的夏天神散，那用in summer 就可以了
但是如果要说游喊氏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.
就是说：每天有规律地睡觉和起床可以帮助你回忆起你的梦。

aid in xxx的意思是在xxx方面有帮助
recollection是回忆
aid in dream recollection 也就是在回忆梦方面有帮助

希望能帮到你！

The students draw pictures in the art room_
美术室画画

in case 万一。是连词，引导条件状语从句。也就是说in case后面是一个完整的句子。例句：1、Take a hat with you in case the sun is very hot.倘若太阳很利害，你就把帽子戴上。2、 In case you need something, please don't hesitate to let me know.
如果你需要什么东西，请不客气地对我说。
3、It may rain you'd better take an umbrella (just) in case (it does).
可能下雨--你最好带把伞, 以防万一（下起来）.
in case of 意思和in case差不多，万一的意思，但是其中of是介词，介词后面只能带名词性质的词，比如名词、代词等。例句：1、In case of rain they can't go.万一下雨，他们就不能去了。2、 We have an auxiliary generator in case of power cuts.
我们有一台万一断电时使用的备用发电机。
3、 The doctor asked us to call him during the night except in case of necessity.
医生吩咐我们，除非必须，否则不要在夜里叫他。