1.impose的基本意思是“强迫,强加”,指将不愉快、不受欢迎的事物强加于某人〔事物〕或强迫某人接纳自己,也可表示“利用,占便宜; 欺骗”“征税”,常与介词on或upon连用。
2.impose用作及物动词时,可接名词或代词作宾语,也可接以as短语充当补足语的复合宾语。

impose on〔upon〕(v.+prep.)
1.把…加于 place sth on sb/sth
▲impose sth on〔upon〕 sb/sth
He always imposes his opinion upon others.他总是把自己的意见强加于人。
◇ 用于be ～ed结构
Heavy duties are imposed on imports.对进口物品课以重税。
▲impose on〔upon〕 sb sth
The university is unwilling to impose upon students the heavy responsibilities of choosing their own courses.这所大学不愿把选课的重大责任放在学生身上。
2.强与…为伴; 使硬缠着 force oneself or one's company on sb
▲impose on〔upon〕 sb
I don't want to impose on you.我并不想打扰你。
▲impose oneself on〔upon〕 sb
Don't impose yourself on people who don't like you.不要硬缠着不喜欢你的人。
3.给…带来麻烦; 利用,欺骗 cause work and trouble for sb; take unfair advantage of sb/sth
▲impose on〔upon〕 sb/sth
He imposed on me.他欺骗我。
This advertisement imposed upon the customers.这则广告欺骗了顾客。
He imposed upon my good will.他利用了我的好意。
You must not let them impose upon your kindness.你不能让他们利用你的热心。

用作及物动词
▲S+～+n./pron.
Overcrowding imposes mental strains.过度拥挤使精神紧张。
The magistrate imposed a fine of ￥1000.法官处以1000元的罚金。
用作宾补动词
▲S+～+n./pron.+as n.
He imposed himself as their leader.他自封为他们的领袖。

［同义词］   command, force, introduce, place on
［词源］＜古法语imposer(把…强加给)