1. 在 [ 容器，地点或地区 ] 里，在...内例句：There's some suger in the cupboard. 碗橱里有一些糖。 My mother was in the kitchen. 我妈妈在厨房里。 My parents live in Beijing now. 我父母现在住在北京。
2. 入...中；进入例句：I never went in pubs. 我从不进酒吧。 He almost drowned when he fell in the river. 他掉入河里差一点淹死。 Get in the car. 上车吧。
3.表示某事完成或发生的方式例句：Her parents always talk to her in English. 她的父母总是用英语和她交谈。 She shouted my name in a harsh voice. 她用刺耳的声音叫我的名字。 We waited in silence. 我们静静的等候。
4. 在[某月，某年，某季节等]例句：My birthday is in May. 我的生日是在三月。 Tom was born in 1983. 汤姆生于1983年。 Bright yellow flowers appear in late summer. 夏末时开出颜色鲜艳的黄色花朵。
5. 在...期间例句：It was amazing hou much we managed to do in a day. 真想不到我们在一天之内做那么多事情。
6. 在[某段时间]之后例句：I'll be with you in a mintue. 我马上就到你那儿。
7.在 [某段时间] 内 [用于否定句或与fist连用]例句：I haven't enjoyed myself so much in years. 我已多年没有玩得那么开心了。 It was the team's first win in eighteen months. 这是该队18个月以来的首次胜利。
9.构成...的整体；包含在...之内例句：There are twelve months in a year. 一年有十二个月。
10.从事或影响某种工作例句：reforms in education 教育改革 He's been in politics for fifiteen years. 他从政有15年了。
11.穿着；戴着例句：He looked very handsome in his uniform. 他穿着制服显得很英俊。 She was dressed in a blue linen suit. 她穿着蓝色的亚麻套装。
12.处于...中[表示某事物或某人的状态，情况]例句：I hear that their marriage in trouble. 我听说他们的婚姻出问题了。 His life was in danger. 他有生命危险。
13.[一群人]参与，参加[活动]例句：About 4,000 students took part in the protest. 大约4000名学生参加了抗议活动。
14.表示形状，排列方式或过程。例句：I want you all to stand in a circle. 我要你们所有人站成一个圈。 Can you walk in a straight line? 你能走直线吗？
15.在...中[用于较小和较大的数字之间，指某事的普遍性或可能性]例句：One in ten homes now has cable TV. 现在十个家庭中有一家拥有有线电视。
16.用于复数或数量前，表示涉及多少人或物例句：Eggs are still sold in half dozens. 鸡蛋仍半打半打地卖。 The children work in pairs. 孩子们两人一组地活动。in their hundreds\ thousands etr (=in very large numbers)成百上千地，大量地
17.用于显示比率例句：a hill with a gradient of one in six 坡度为1比6的小山
18.指某物的颜色或组成成分例句：Do you have the same pattern in blue? 相同款式的你有蓝色的吗？
19.在...方面例句：Milk is very rich in calcium. 牛奶中含有丰富的钙质。
20.用以描述某地的天气或具体环境例句：Would you prefer to sit in the shade? 你喜欢坐在背阴处吗？
21.处于...中[表示做某事时的情感]例句： It was all done purely in fun. 这么做纯粹是闹着玩的。 She looked at me in horror. 她惊恐的看着我。
22.用于某人或某物的名字前，表示对其的看法例句：You have a very good friend in Bob. 你的朋友鲍勃真不错。
23.指人或物有某种特性例句：I don't think Freddy had it in him to be a killer. 我认为弗雷迪成不了杀手。