介词until, up和upon的用法及例句

介词评论

1．until的用法和例句：
1)直到：
They talked until one o'clock in the morning．
他们一直谈到半夜一点钟。
It's better to wait until tomorrow．
最好等到明天再说。
They stayed there until quite late.
他们在那儿一直待到很晚。

2)(until用于否定句, not...until)直到……才：
We didn't finish the work until yesterday evening
我们昨天晚上才完成这项工作。
They did not stop until after six o'clock.
他们八点以后才收工。
Don't tell him about it until a little later.
等晚一些时候再告诉他。

2．up的用法和例句
1)往上：
The boat sailed up the river．
船逆江而上。
I met him as I was going up the hill.
我上山时碰到了他。
He helped me to carry the suitcase up the stairs他帮助我把箱子提上了楼。

2)在上……的地：
The house stands half way up the mountain.
房子在半山腰。
They built the power station a mile up the hill.
他们把电站修在小山往上一英里处。

3)沿着(街道)：
A taxi moved up the street.
一辆山租车沿街道开来。
Jimmy rushed up the street．
吉米沿街跑着。

3.upon的用法和例句
1)在……上面，大多数时候可以和on换：
She placed the tray upon (on)the table.
她把盘子放在桌上。
A lot of work fell upon (on)his shoulders.
很多作落到他肩上。

2)用于某些成语(有些可用on代替)：
We mustn't impose our view upon(on)others
我们不能把自己的看法强加于人。
He laid great stress upon (on)the second point．
他对第二点非常强调。
The family lived upon (on)a small income．
这人靠少量收入过活。
They insist upon(on)her staying there for supper．
他们坚持留她在那里吃晚饭。
once upon a time 从前（不用on）