i was amazed by what he did. 哪一个句子正确?
i was excited with what he did. 这个句子介词用的正确吗？
在用be动词和动词的过去式表示心情的时候，到底什麽时候在动词过去式的后面用by，什麽时候用with？？？
提问者： 岁月如song - 助理 二级 最佳答案 1. by表方式：
（1）表示以一般的方法或方式。如：
No one in those days could live by writing poems.
（2）表示传达、传递的方式或煤介。如：
How did you send the letter, by airmail or by ordinary mail?
（3）表示用交通工具、通讯工具后接名词单数，不加冠词。如：
He came by train, but his wife came by bus.
注意下面两句的区别：
Did you come by train?
Did you come in his car / on my bike?
“by +抽象名词”构成的词组有：by accident / by chance / by diligence / by effort / by force / by heart / by luck / by mistake / by hard work.
2. through表示“以；通过；经由”。如：
He succeeded through hard work.
3. with表示方式
（1）表示行为方式，意为“以；带着；用”。如：
We are well provided with food and clothing.
（2）表示使用具体的工具或手段。如：
He writes with a pen.
注意：在表示手段时，by, through, with有时也可换用，但with的意思更明确。如：
Through / By / With his efforts he succeeded in making so many useful inventions. 参考资料：正确,
介词是甚么
悬赏分：0 - 解决时间：2006-11-29 08:19 说明介词短语和介词
提问者： lxzj04w44 - 魔法学徒 一级 最佳答案
介词 (preposition) 又称前置词，是英语中最活跃的词类之一，它表示的是它后面的名词或代词(或相当于名词的其他词类、短语或从句)与其他句子成分的关系。
介词可分为下列三类：
1. 简单介词，如：
about, above, across, after, against, among, at, before, behind, below, beneath, beside, besides, beyond, but, by, down, during, except, for, from, in, like, near, of, off, on, over, past, round, since, through, to towards, under, until, till, up, with 2. 合成介词，如：
inside, into, onto, outside, throughout, upon, within, without 3. 短语介词，如：
according to, along with, apart from, as for, as to, because of, by means of, in front of, in spite of, instead, in accordance with, on account of, on behalf of , owing to, due to, together with, up to, with regard to, next to, prior to 介词不能单独充当句子成分，它必须与名词或相当于名词作用的成分构成介词短语才能充当 句子的成分。
二、介词短语的句法功能
1. 作定语，例如：
I have lost the key to the door of my room. 我把房间的钥匙丢了。
三、介词的固定搭配
1. At
be good at 精通于 be annoyed at 对……烦恼 be angry at 对 (事) ……发怒 (take) aim at 瞄准 laugh at 因……而发笑 stare at 盯着看，凝视 at the best 充其量 at first 开始 at large 自由地 at least 至少，起码 at length 最后，终于 at once 立即，马上 at present 现在 at rest 休息，静止不动 at times 间或，有时
He was angry at his brother's remark. 他对他兄弟的批评很恼火。
I don't know him but he has been staring at me for ten minutes. 我不认识他，但是他盯了我足有十分钟。
The foreign countries' attempt at a blockade of the port was unsuccessful. 外国试图对这个港口实施封锁，但没有成功。 I know I am at fault. 我知道我错了。
The escaped prisoner is still at large. 那逃犯仍逍遥法外。
He is at present away on his holidays. 他现在到外地度假去了。 2. About
careful about 小心
particular about 对……讲究 careless about 粗心 doubtful about 对……怀疑 sure about 肯定 concerned about 担心 a complaint about 抱怨，叫屈 bring about 导致，引起 care about 关心，介意 leave about 乱放，乱扔 fuss about 大惊小怪 anxious about 担心，想念
例如：
How did it come about? 那事是怎样发生的?
She is crazy about pop music. 她对流行音乐着了迷。
English people are always making complaints about their weather. 英国人老是埋怨天气不好。
He is enthusiastic about the music of Brahams. 他热衷于布拉姆斯的乐曲。
Harry likes eating very much but he isn't very particular about the food he eats. 哈里很爱吃，但对他所吃的食物倒并不讲究。 3. Against
fight against 反对 immune against 免除…… vote against 投票反对
protect … against 保护……免受 stand against 反对，经受住 an accusation against 控制，谴责 a prejudice against 偏见，万岁 guard against 防护 protest against 反对，抗议 rise against 起来反抗 run against 对……不利，违反 strive against 和……斗争 a defence against 防护，保卫 a protest against 抗议，反对 例如：
I protest against their criticism. 我对他们的批评提出抗议。
He made a false accusation against his boss. 他诬告上司。
Those clothes don't give you much protection against the cold. 那些衣服不能使你御寒。
He should guard against passing on disease to his family. 他应当注意别把病传给自己家里的人。 4. By
abide by 遵守 pull … by 拉住 by mistake 弄错，失误 by virtue of 靠，由于 by means of 使用 by aid of 借助于
by way of 经由
by force 以武力，强迫地 by marriage 联姻而产生的 例如：
He is by nature a kind, generous fellow. 他是个天性和蔼慷慨的人。
They sent the letter to me by mistake. 他们误把那封信送给了我。
The old Roman armies had several generals who took command by turns. 古罗马的军队由几位大将轮流指挥。
By virtue of his victory, he felt he could do what he pleased. 由于胜利，他感到可以想干什么就干什么了。 I probably know him by sight but not by name. 我大概见面认识他，不过叫不上名字。 5. For
competent for 胜任 for good 永远
for the sake of 为……缘故 for the better 好转
for the purpose of 为……目的 for a change 改变一下 for the time being 暂时 for fear of 免得
an affection for 爱，爱情 application for 申请
(make) preparation for 为……作准备 blame for 责怪，责备 cause for 理由
readiness for 为……准备就绪 an occasion for 时机，机会 contempt for 轻蔑，藐视 a demand for 需要，需求 evidence for 证据，根据 a fondness for 喜欢 a reason for 理由，原因 a respect for 尊敬，尊重 a search for 搜寻，找寻 例如：
I should like to repeat my opening remarks for the benefit of those who just came in. 我愿重复一下我的开场白，以便让刚入场的人也能听到。 She got up early to be ready for the post. 为了静心等候邮件，她一早就起床了。
which的用法
