1.indeed常用来表示赞同对方的意见、表示自己确定的意思或加强very等词的语气。
2.indeed表示“赞同对方的意见”或“同意某人所谈之事”,相当于certainly,多用于口语中。indeed作“事实上,真正地”解时,多用来补充说明自己论点的正确,以达到进一步加深印象的目的; indeed作“当然,固然”解时,表示让步。
3.indeed一般置于“very+adj./adv.”之后,有时也可放在其他位置。
4.在口语中indeed也用于对说话人所谈的事情表示“感兴趣、吃惊或不相信”; 有时也用来嘲弄或讽刺对方所讲的陈词滥调等。
5.indeed还常与but连用,用来连接两个句子,表示“诚然…不过(但是)”。

用作状语
It is indeed unfortunate!那的确是不幸啊!
Thank you very much indeed.实在感谢你。
The gap between the poor and the rich is very wide indeed.穷人和富人之间的差距确实很大。
She indeed lives in a fool's paradise as she always dreams about making a huge fortune overnight.她总想顷刻间大发横财,的确有点想入非非。
It will indeed be an honour to serve in your government.在你的政府任职确实十分荣幸。
He is indeed a remarkable painter.他是个真正杰出的画家。
That's praise indeed.那确实是在表扬。
There are indeed exceptions to this rule.这条规则的确有很多例外。
This act has failed to bring women's earnings up to the same level.Indeed the gulf is widening.这项法案没有把妇女的工资提高到同等水平,这样确实是在扩大了差别。
A friend in need is a friend indeed.患难的朋友才是真正的朋友。
There are many good people and good deeds in our class, indeed in the whole school.我们班上的好人好事多,实际上在整个学校都是这样。
“I heard it on the wireless.”“Wireless indeed! They are called radio now, you ｋnow.”“我是通过wireless听到的消息。”“什么?Wireless?现在wireless已改称为radio了,连这点常识你都没有哇!”
Indeed, the drought is serious, but it can't scare us.旱情诚然是严重的,不过它吓不倒我们。
“Who is this woman?”“Who is she, indeed!”“这个女人是谁?”“她是谁?真是!”

indeed, really, truly
这三个词都可表示“真正地”。其区别在于:indeed多用于肯定对方的话或加强自己的话; really多用于进一步说服对方,或表示惊奇,或表示含蓄的怀疑; 而truly多用于强调事物的真实性。例如:
You are right.It is indeed a difficult problem.你说得对,这真是一道难题。
Do you really want to go?你真要去吗?
It is truly hot.今天真热。

我的确非常高兴收到你的信。
［误］  I was pleased indeed to get your letter.
［正］  I was very pleased indeed to get your letter.
［析］  indeed可跟在“very+形容词或副词”后面以加强语气,表示“真的”“的确很…”,其中的very不能省略。

indeed不可直接修饰形容词或副词,须修饰“very+adj./adv.”,这一点不能简单地从形式上去理解。当形容词或全句含有very的意味或含有比较意味时,即使该形容词或副词前没有very,也是可以用indeed来修饰的。例如:
The play is excellent indeed.这场演出确实很精彩。
Compared to many women, she was indeed fortunate.与许多妇女相比,她确实是很幸运的。

［同义词］   actually, certainly, really, truly
［词源］  ＜中古英语inded(做完的事,实实在在)