in的用法如下：
1.(表示位置)在…里面〔内,中〕; 在,于; 在…部位上 at a point within the area or volume of (sth)
2.(表示时间)在…时期,在…之后,在过程中 during (a period of time); after (a maximum length of time)
3.(表示方向)往…内,朝…方向 toward
4.(表示状态)处于…之中,在…情况下,在…身上,穿着 (indicating physical surroundings, circumstances)
5.(表示方式)用,以,按,乘,以…形式 (indicating form, shape, arrangement or quantities)
6.(表示原因)由于,为了 for
7.(表示领域,范围)在…以内 within the shape of
in读音：英 [ɪn] 美 [ɪn]
释义：
prep.在(某范围或空间内的)某一点;在(某物的形体或范围)中;在…内;在…中;进入
adv.在里面;在内;进入;在家里;在工作单位
adj.流行的;时髦的
n.执政者;门路;知情者
例句：He opened the door and stepped in.
他打开门走了进去。
扩展资料
近义词：inside 、among
一、inside读音：英 [ˌɪnˈsaɪd] 美 [ˌɪnˈsaɪd]
释义：
prep.在(或向)…内;在(或向)…里;少于(某时间)
adv.在(或向)里面;在监狱里;被监禁
n.里面;内部;内侧;(靠近路边的)慢车道;(道路或跑道拐弯处的)内侧，里道，内圈
adj.内部的;里面的;从内部了解到的;内线干的
例句：Inside the passport was a folded slip of paper
护照里面有张折起的纸片。
二、among读音：英 [əˈmʌŋ] 美 [əˈmʌŋ]
释义：prep.在…中;周围是;在(其)中;…之一;在三者或以上中(分配或选择)
例句：They walked among the crowds in Red Square.
他们在熙熙攘攘的红场散步。
1、用作介词 (prep.)
例句：The telephone was in the little study on the ground floor.
电话在底楼的小书房里。
2、用作副词 (adv.)
例句：He is not in at the moment.
这个时候他不在家。
3、用作形容词 (adj.)
例句：The in part of the machine is very complex.
该机器内部结构非常复杂。
4、用作名词 (n.)
例句：The election made him an in.
这次选举使他成为执政者。
单词解析：
in 读音：英 [ɪn] 美 [ɪn]
prep. 在 ... 里；在 ... 地方；在 ... 期间；在 ... 方面；进入...里面；处于...状态；穿着...；以...的方式
adv. 在家；入；进；向里；在某地；并入；在某种关系中
adj. 在里面的；新来的；执政的；<口>时髦的
n. 当权者；影响；达成目标的路径
扩展资料：
同类词
1、on 读音：英 [ɒn] 美 [ɑ:n]
prep.（表示方向）向;（表示对象）对;（表示位置）在…上;（表示时间）在…之时
adv.（放，穿，连接）上;向前，（继续）下去
adj.活动着的情况，状态;使用着的;发生着的;计划中的
例句：He is sitting beside her on the sofa
他挨着她坐在沙发上。
2、at 读音：英 [ət] 美 [æt,ət]
prep.（表示位置）在;在（某时间或时刻）;以，达; 向，朝
n.阿特（老挝辅币单位，100 阿特 = 1 基普）
例句：We had dinner at a restaurant in Attleborough
我们在阿特尔伯勒的一家餐厅里吃的饭。
3、under 读音：英 [ˈʌndə(r)] 美 [ˈʌndɚ]
prep.在…下面，在表面之下;在…的假定表面或掩饰下;少于，小于;在…情况下
adv.在下面;少于;在水下;在昏迷中
adj.较低的，下面的
例句：The dog squeezed under the gate and ran into the road.
4、between 读音：英 [bɪˈtwi:n] 美 [bɪˈtwin]
prep.在…之间;私下，暗中;在…中任择其一;来往于…之间
adv.当中，中间
例句：She left the table to stand between the two men
她离开桌子，站在了那两个男人之间。
一、表示时间，意为“在时期， 在之后， 在过程中”，例如：
1、in表示年、月、季节、世纪、时代等
in the eighties（在八十年代），in spring（在春季）
2、介词in + 一段时间，一般用于一般将来时。
I’ll come back in five minutes。
我5分钟后就回来（以现在时间为起点，表示从现在起多久以后）
二、表地点、位置、范围、空间，意为“在里面；在于；在部位上”
1、In表示地点时，后面一般接大地点，如in London，in Beijing
2、in 表示空间位置时，表示“在范围之内”。 The ball is in the box。 球在盒子里
三、表示状态、情况；意为”处于情况，在之中”
如in high spirits(兴高采烈）
in debt债务重重
四、表示手段，方法，材料，意为“以(方式)，用(语言)，用......材料”
如：They paid in cash。他们用现金支付
五、表示服饰等，“穿；戴，带着”，要用介词in
如：The policeman is in uniform。警察穿着制服。
这是介词的一个特点，当介词in单独使用时，或者与其它动词构成固定搭配时，都不能脱离其作为介词的特点。
in 常用意思：在..., 在...之内，从事于..., 按照..., 穿着...。
He was born in 1992. 他生于1992年。
I could finish the program in two weeks.我可以用两周时间完成这个项目。
He spend less time in reading.他读书时间很少。
The man in black jacket is our teacher.穿黑夹克的那个人是我们的老师。
一些与介词in的固定搭配，供参考：
表示时间
in 1999, in 20 century, in a flash(瞬时), in a lucky hour(在幸运时刻), in a minute, in a second, in a short time, in a while, in a wink(一瞬间) in advance(预先), in an emergency(在紧急地时候), in an evil hour(在不幸地时刻), in an instant, in ancient times, in broad day(在大白天), in course of, (在…期间), in December, in due course(及时地), in future, in good season(及时地), in no time(马上), in one”s childhood, in one”s spare time, in one”s teens, in one”s youth, in recent years, in season(适时), in seconds(在很短的时间), in some cases(有时候), in spring, in the afternoon, in the beginning, in the daytime, in the end, in the evening, in the future, in the long run(最后), in the meantime, in the morning, in the nick of time(在紧急关头), in the night, in the past, in the thick of (在最激烈的时刻), in the thick of(在最激烈的时刻), in this period, in those days, in time of war, in time，
表示地点
in a car, in a queue, in advance of (在…前面), in all the direction, in appearance, in corners(在角落里) in doors, in front (of), in good light(在光线好的地方), in heaven, in place(position)(在适当地位置), in places(处处), in port(在港内), in public places, in shore(靠岸), in society, in the air(在空中) in the bank, in the book(书的内容里), in the centre(在中央), in the countryside, in the distance(在远处那边), in the east of(在…东部) in the east, in the fields, in the film, in the front rank(在前列), in the front row, in the lab, in the letter(信的内容), in the middle of, in the moonlight, in the newspaper(报纸的内容里), in the open air(在户外), in the open(在野外), in the picture, in the rain, in the room, in the shade of, in the sky, in the suburbs of, in the sunshine, in the tree, in the universe, in the vicinity of(在附近), in the warm(在暖和的地方) in the world, in(on) the bus, in(on) the street,
表示状态
in progress(在进行中), in a dilemma(处于进退两难的境地), in a hurry, in a tight corner(处于困难中), in action(在行动中), in an emergency, (处于紧急情况中), in anxiety, in astonishment, in bad mood(心情不好), in bad temper(心情不好，生气), in bed, in blossom(bloom) (在开花 ), in bonds(在拘留中), in chains(在囚禁中), in charge(看管), in church, in class, in collision(在冲突中), in commission (在服役), in condition(健康情况良好), in confusion (在混乱中), in control (of), in court(出庭), in custody(拘留), in danger, in debt(负债) , in deep water(s)(处于困境), in demand(有需求) in despair, in difficult, in dispute(在争论), in doubt, in employment, in exile(在流放), in fear and trembling(提心吊胆), in flight(飞行), in flood, in full blossom(开着花), in good condition, in good health, in high spirits, in horror, in hospital, in isolation. in love, in
motion, in need (of) in operation(在运转), in order(状态良好), in panic, in peace(平安)(at peace和平), in peril(处于危险), in place, in power, in practice(在实践中), in preparation, in process(在进行中), in production, in progress(前进，进行中), in pursuit(在追赶中), in question(正被讨论), in rehearsal(在彩排), in retirement(退休), in retreat(在撤退) in sail(张着帆) in secret, in service, in session(在会议中), in short supply, in silence, in sorrow, in stock(有库存) in store(储藏着) in succession, in surprise, in suspension(悬浮中) in tears(流着泪) in the field(在作战), in the press(在印刷), in the red(负债), in the same boat(处境相同), in the works(在计划中), in thought, in trade, in triumph, in trouble, in use, in view(被考虑), in wonder, in work(有工作), in work, in(at) college, in(at) school, in(at) university,
in和after该怎么用？你知道多少？
