Question

问几个英语问题

in on at这三个单词有什么区别，什么时态用什么

Answer 1

太多了.
at
[At, Et]
prep.
在, 于, 向, 对准, 在...方面
[域] Austria , 奥地利

At
symb 〈化〉砹 (astatine)

AT
=Acid Treatment酸处理

at
at 1
AHD:[²t] […t] 非重读时
D.J.[#t][*t]非重读时
K.K.[#t][*t]非重读时
prep.（介词）
In or near the area occupied by; in or near the location of:
在…里，在…附近：在某一被占据地区里或附近；在某一场所里或附近：
at the market; at our destination.
在市场；在我们的目的地
In or near the position of:
出现在…一面：在或接近某一位置：
always at my side; at the center of the page.
总是站在我一边；在页码中央
To or toward the direction or location of, especially for a specific purpose:
向，朝向：到或朝某一方向或位置，尤指朝一特定目的：
Questions came at us from all sides.
从四面八方向我们涌来的问题
Present during; attending:
出席：在…出现；出席：
at the dance.
出席舞会
Within the interval or span of:
在…期间：在某一时间间隔或时间跨度内：
at the dinner hour; at a glance.
吃饭时间；转瞬间
In the state or condition of:
在某一状态或状况下：
at peace with one's conscience.
心安理得
In the activity or field of:
在某一活动或某一领域内：
skilled at playing chess; good at math.
精于棋艺；擅长数学
To or using the rate, extent, or amount of; to the point of:
在某一点：到达或运用比率、限度、或数量；在某一点：
at 30 cents a pound; at high speed; at 20 paces; at 350=F.
每英镑三十分；以高速；在二十步处；在华氏三百五十度时
On, near, or by the time or age of:
到达，接近：到达，接近某一时刻或年龄，或到某一时刻或年龄为止：
at three o'clock; at 72 years of age.
到三点；到七十二岁时
On account of; because of:
根据；因为：
rejoice at a victory.
因胜利而欢欣鼓舞
By way of; through:
以…方式；通过：
exited at the rear gate.
从后门溜走
In accord with; following:
根据；遵循：
at my request.
根据我的请求
Dependent upon:
凭借：
at the mercy of the court.
在法庭的宽容下
Occupied with:
正在：
at work.
正在工作

at it【非正式用语】
Engaged in verbal or physical conflict; arguing or fighting:
争论，冲突：口头或身体上的冲突；争论或冲突：
The neighbors are at it again.
邻居们又吵起来了

Middle English
中古英语
from Old English æt * see ad-
源自 古英语 æt *参见 ad-

at
at 2
AHD:[ät]
D.J.[$8t]
K.K.[$t]
n.（名词）
【复数】 at
A unit of currency in Laos.See table at currency
阿特：老挝货币单位参见 currency

Thai
泰国语

aT
aT
abbr.（略语）
Attotesla.
Attotesla.

At
At 1
NONE（无词性）
The symbol for the element astatine
元素astatine的符号

At
At 2
abbr.（略语）
Ampere-turn.
Ampere-turn.

AT
AT
abbr.（略语）
Air temperature.
气温：空气温度
Also a/t Antitank.
也作 a/t Antitank.
Automatic transmission.
自动转换

at
.at
abbr.（略语）
Austria [in Internet addresses]
Austria[in Internet addresses]

at
=airtight 气密的, 不透气的;
ampere-turns安培匝(数);
atmosphere (标准)大气压

At
【化】元素 砹(astatine)的符号

AT
=Acid Treatment酸处理;
Air Temperature空气温度;
Air Transport(ation)空运;
Ambient Temperature周围介质温度, 环境温度;
American Terms美国用语;
Army Train军用列车;
Antitank 反坦克的;
Atlantic Time大西洋时间;
Atmosphere(标准)大气压(单位);
Atomic原子的;
Automatic Telephone自动电话(机);
Automatic Ticketing自动订票;
Automatic Transmitter自动发报机;
Automatic Typerwriter自动打字机;
Autotransformer 自耦变压器

at
at 1
AHD:[²t] […t] when unstressed
D.J.[#t][*t]when unstressed
K.K.[#t][*t]when unstressed
prep.
In or near the area occupied by; in or near the location of:
at the market; at our destination.
In or near the position of:
always at my side; at the center of the page.
To or toward the direction or location of, especially for a specific purpose:
Questions came at us from all sides.
Present during; attending:
at the dance.
Within the interval or span of:
at the dinner hour; at a glance.
In the state or condition of:
at peace with one's conscience.
In the activity or field of:
skilled at playing chess; good at math.
To or using the rate, extent, or amount of; to the point of:
at 30 cents a pound; at high speed; at 20 paces; at 350=F.
On, near, or by the time or age of:
at three o'clock; at 72 years of age.
On account of; because of:
rejoice at a victory.
By way of; through:
exited at the rear gate.
In accord with; following:
at my request.
Dependent upon:
at the mercy of the court.
Occupied with:
at work.

at itInformal
Engaged in verbal or physical conflict; arguing or fighting:
The neighbors are at it again.

Middle English
from Old English æt * see ad-

at
at 2
AHD:[ät]
D.J.[$8t]
K.K.[$t]
n.
pl. at
A unit of currency in Laos.See table at currency

Thai

aT
aT
abbr.
Attotesla.

At
At 1
NONE
The symbol for the element astatine

At
At 2
abbr.
Ampere-turn.

AT
AT
abbr.
Air temperature.
Also a/t Antitank.
Automatic transmission.

at
.at
abbr.
Austria [in Internet addresses]

Answer 2

in在里面，在...之内。用完成时，现在时
on在上面，在...时候，用较近的将来。
at在...，一般用在一点上

Answer 3

in -在里面
on ＝ 在上面
at ＝ 在 (该处、某处、该时间)