按字母顺序，每天连续为同学们发送3500词系列。这个系列好的地方在于附带朗读音频，而且它不是单个呈现单词，和单词相关的重点短语和句型也一并给出来，这样，我们不仅可以练习发音，还可以在语境中记忆单词，而且在记单词的同时也掌握了其用法。
高考3500词汇（A—Z）ABCDEFGH已更新
I
I [aɪ] pron. 我
ice [aɪs] n. 冰
ice-cream [aɪs- kriːm] n. 冰淇淋
Iceland [ˈaɪslənd] * n. 冰岛
idea [aɪˈdɪə] n. 主意,意见,打算,想法
have some/no idea 从句/of… 知道/不知道......
I have no idea why she left.
I have no idea of his address.
identity [aɪˈdentɪtɪ] n. 身份, 特征
The police are trying to discover the identity of the killer.
The thief used a false identity.
identity card=ID card 身份证
identification [aɪdentɪfɪˈkeɪʃ(ə)n] n. 鉴定, 辨别
idiom [ˈɪdɪəm] n. 习语, 成语
if [ɪf] conj.如果,假使,是否,是不是
ignore [ɪɡˈnɔː(r)] v. 忽视, 对…不理会
ill [ɪl] a. 有病的；不健康的
ill与sick的区别：
ill当生病讲时只做表语，sick当生病讲时可做表语也可作定语。
He was ill/sick.
a sick mother
have a bad/an ill effect on 对...…影响不好
speak/think ill of sb. 说某人的坏话
illegal [ɪˈliːɡ(ə)l] a. 非法的
It is illegal to drive through a red light.
illegally adv.
He entered the country illegally.
illness [ˈɪlnɪs] n. 疾病
imagine [ɪˈmædʒɪn] vt. 想像, 设想
imagine sth./doing sth.
I can’t imagine life without the children now.
I can’t imagine his becoming a teacher.
immediate [ɪˈmiːdɪət] a. 立即的, 马上
He answered almost immediately.
Turn right immediately after the church.
Immediately he had gone,I remembered his name.他一走，我就想起了他的名字。
immediate adj. 立刻的，立即的，直接的
an immediate reaction/response 直接的反应
take immediate action 立即采取行动
immediately [ɪˈmiːdɪətlɪ] ad. 立即
immigration [ɪmɪ‘greɪʃn] n. 移民
import [ɪmˈpɔːt] v.& n. 进口, 输入
the import of electrical goods 电器的进口
All the meat is imported from France.
importance [ɪmˈpɔːt(ə)ns] n. 重要性
important [ɪmˈpɔːtənt] a. 重要的
impossible [ɪmˈpɔsɪb(ə)l] a. 不可能的
impress [ɪmˈpres] vt. 留下极深的印象
impress sb with sth/sb 使某人对...留下印象
He impressed us with his sincerity（真诚）.
impress sth on/upon sb 使某人对某事印象深刻；使某人铭记......
He impressed on us the need for immediate action.
impression [ɪmˈpreʃ(ə)n] n. 印象, 感觉
① get a good/bad impression of sb 对某人印象好/坏
a general/an overall impression 总体印象
② My words made no impression on her.我的话没有给她留下印象。
His trip to India makes a strong impression on him.
③ be under the impression that 觉得，认为
I was under the impression that the work had already been completed.
improve [ɪmˈpruːv] vt. 改进, 更新
in [ɪn] prep. 在…里(内)；在…；以… ad. 在家, 在内, 向内
in a word 话说
in all 总共
in modern times
be measured in tons 用吨来衡量
in that… 因为......
She was lucky in that she had friends to help her .
in the eighteenth century
in the1990s 在20世纪90年代
in one’s twenties 在某人二十几岁的时候
in pencil/ English/ ink 用铅笔/英语/墨水
pay sth in cash 用现金支付
The wall is 3meters in height/high.
The rope（绳子） is 3 meters in length/long.
inch [ɪntʃ] n. 英寸
incident [ˈɪnsɪd(ə)nt] n. 事件
include [ɪnˈkluːd] vt. 包含, 包括
Everyone laughed, including me. (me included.)
income [ˈɪnkʌm] n. 收入, 所得
incorrect [ɪnkəˈrekt] a. 不正确的, 错误的
increase [ɪnˈkriːs] v. & n. 增加, 繁殖
increase to/by 增加到/了
Great demands lead to a large increase in supply.
increasingly adv. 越来越多地，不断增加地
increasingly
difficult/important/popular越来越难/重要/流行
indeed [ɪnˈdiːd] a. 确实；实在
independence [ɪndɪˈpendəns] n. 独立
independent [ɪndɪˈpendənt] a.独立的,有主见的
India [ˈɪndɪə] * n. 印度
Indian [ˈɪndɪən] a.(美洲)印地安人的; 印度人的 n. 印地安人；印度人
Indicate [‘ɪndɪkeɪt] v.表明, 象征, 暗示
A red sky at night often indicated fine weather the next day.
In his letter, he indicated to us that he was willing to cooperate（合作）.
indication n.
indication of sth/doing sth
They gave no indication of how the work should be done. 他没有指出这项工作该如何做。
industry [ˈɪndəstrɪ] n. 工业, 产业
industrial adj. 工业的，产业的
heavy/light industry
influence [ˈɪnflʊəns] n.& v. 影响
have a strong influence on/upon sb/sth
have influence over sb/sth 有左右某人的能力
His parents no longer have any influence over her.
under the influence of sb/sth 在......的影响下
He committed the crime under the influence of the drugs. 在毒品的影响下，他犯了罪。
Those friends are a bad influence on her.
His writings have influenced the lives of millions.
inform [ɪnˈfɔːm] vt. 告诉； 通知
inform sb. of/that 告知某人......
We regret to inform you that your application has been rejected.
keep sb. informed of 使某人得知......
information [ɪnfəˈmeɪʃ(ə)n] n. 信息
information desk [ɪnfəˈmeɪʃ(ə)n desk] 问讯处
initial [ɪˈnɪʃ(ə)l] a. 开始的, 最初的
injure [ˈɪndʒə(r)] vt. 损害, 伤害
He injured his knee playing football. 踢足球的时候，他伤了他的膝盖。
This could seriously injure the company’s reputation（名誉，荣誉）.
injury n. 伤害，损害；伤口
There were no injuries in the crash（坠毁）.
The players are out of the team because of injury. 这些运动员因为受伤退出了球队。
injury [ˈɪndʒərɪ] n. 受伤处
ink [ɪŋk] n. 墨水, 油墨
inland [ˈɪnlənd, ˈɪnlænd] a. 内陆的；内地的
inn [ɪn] n. 小旅店；小饭店
innocent [ˈɪnəsənt] a.无辜的, 清白的
insect [ˈɪnsekt] n. 昆虫
insert [ɪnˈsɜːt] vt. 插入
insert sth in/into/between sth
They insert a tube（管子） in his mouth to help him breathe.
inside [ɪnˈsaɪd] prep.在…里面 ad.在里面
insist [ɪnˈsɪst] vi. 坚持；坚决认为
The man insisted that he hadn’t stolen anything and that he (should) be set free.
insist on doing sth. 坚持做某事
inspect [ɪnˈspekt] vt. 检查；检验；审视
inspection n. 检查，视察
inspector n. 检查员，视察员
The teacher walked around inspecting their work.
inspire [ɪnˈspaɪə(r)] vt. 鼓舞； 激励
instant [ˈɪnst(ə)nt] a. 瞬间；刹那
instantly adv. 立即地，立刻地
The show was an instant success.
instant coffee/noodles 速溶咖啡/方便面
I will be back in an instant.
At the very instant, the door opened.
I recognized her the instant I saw her. 我一看到她就认出了她。
instead [ɪnˈsted] ad. 代替, 顶替
Lee was ill, so I went instead.
He didn’t reply. Instead, he left.
instead of 代替，而不是
Now I can walk to work instead of going by car.
institute [ˈɪnstɪtjuːt; (US) ˈɪnstətuːt] n. (研究)所, 院, 学院
institution [ɪnstɪˈtjuːʃ(ə)n; (US) ɪnstəˈtuːʃn] n. (慈善、宗教等性质的)公共机构； 学校
instruct [ɪnˈstrʌkt] vt. 通知；指示；教
instruct sb to do
She arrived at 10 o’ clock as instructed.
The letter instructed him to report to headquarters（总部）immediately.
instruction n.指导，教授，命令
follow one’s instructions
carry out/ignore one’s instructs 执行/忽视某人的指导/命令
instruction [ɪnˈstrʌkʃ(ə)n] n. 说明,须知;教导
instrument [ˈɪnstrʊmənt] n. 乐器;工具,器械
insurance [ɪnˈʃʊərəns] n. 保险
insure [ɪnˈʃʊə(r)] vt. 给……保险
Have you insured the contents of your home?
intelligence [ɪnˈtelɪdʒəns] n.智力,才智,智慧
intend [ɪnˈtend] vt. 想要, 打算
intend (sb.)to do
I intend to spend the night there.
intend that
It is intended that these meetings will become a regular event.
be intended for sb./sth 专门为......准备/设计
The book, intended for children aged 5-7,sells well.
intention [ɪnˈtenʃ(ə)n] n. 打算,计划,意图
intention of doing sth/to do sth
I have no intention of going to the wedding.
I had every intention of paying her back what I owe her.
She is full of good intentions.
He left England with the intention of traveling in Africa.
interest [ˈɪntrəst] n. 兴趣, 趣味;利息
interest sb. 使某人感兴趣
I bought the book that interested me most.
show/have/feel/express (an) interest in…
lose interest in…
I watched the game with interest.
利益(C) 常用复数形式 protect customers’ interests
a place of interest/places of interest 名胜古迹
interesting [ˈɪntrətɪŋ] a. 有趣的
international [ɪntəˈnæʃən(ə)l] a. 国际的
internet [ˈɪntənet] n. 互联网, 英特网
interpreter [ɪnˈtɜːprɪtə(r)] n.翻译
interpret v. 口译，解释
interpret the poem
interpret sth as sth
I didn’t know whether to interpret her silence as acceptance or refusal.
interpret for sb
interrupt [ɪntəˈrʌpt] v. 打扰, 打断
interval [ˈɪntəv(ə)l] n. 间歇；间隔
interview [ˈɪntəvjuː] n.& vt.采访,会见,面试
a television/newspaper/radio interview
Which post are you being interviewed for?
If you don’t interview well ,you are unlikely to get the job.
interviewee n. 被采访者，被面试者
interviewer n. 采访者，面试者
into [ˈɪntʊ, ˈɪntə] prep. 到…里;向内；变成
introduce [ɪntrəˈdjuːs; (US) -duːs] vt. 介绍
introduction [ɪntrəˈdʌkʃ(ə)n] n. 引进, 介绍
introduction n.
introduce sb. to sb./oneself
introduce sb. to sth.
It was she who first introduced me to the pleasures of sailing.
introduce new technology
an introduction to English grammar
invent [ɪnˈvent] vt. 发明, 创造
invention [ɪnˈvenʃ(ə)n] n. 发明, 创造
inventor [ɪnˈventə(r)] n. 发明者, 创造者
invitation [ɪnvɪˈteɪʃ(ə)n] n. 邀请, 请帖
invite [ɪnˈvaɪt] vt. 邀请, 招待
Ireland [ˈaɪələnd] * n. 爱尔兰
Irish [ˈaɪərɪʃ] a. 爱尔兰的, 爱尔兰人的
iron [ˈaɪən; (US) ˈaɪərn] n. 铁, 熨斗 vt. 熨烫
irrigate [ˈɪrɪɡeɪt] vt. 灌溉
irrigation [ɪrɪˈɡeɪʃ(ə)n] n. 灌溉
island [ˈaɪlənd] n. 岛
it [ɪt] pron. 它
Italian [ɪˈtæljən] a. 意大利(人)的；意大利语的 n. 意大利人；意大利语
Italy [ˈɪtəlɪ] * n. 意大利
its [ɪts] pron. 它的
itself [ɪtˈself] pron. 它自己