across用作介词和副词时意思

发布时间:2022-12-06分类:初一辅导

across有两个词性。当做介词时,意思是穿过;横穿(表示场所,方向的介词)。当做副词时,意思是横过;在对面。若across后面跟有宾语,它就是介词;若across后面没有跟宾语,它就是副词。例如:The mosquito flew across the room.蚊子飞过房间。(介词)A bird flew across to the tree and alighted on a branch.一只鸟飞向对面那棵树,停在一根树枝上。(副词)

用作介词和副词的across

1、用作介词或副词,注意以下用法:

(1)表示动态意义,意为“横过”、“到……的另一边”。如:

I cam swim across the river in 10 minutes.我可以在十分钟之内游过河去.(介词用法)

Can you swim across?你能游过去吗?(副词用法)

(2)表示静态意义,意为“在……的另一边”。如:

My house is just across the street.我家就在街道对面.(介词用法)

We leave Dover at ten and we should be across in Franceby midnight.我们十点钟离开多佛,午夜时应能抵达法国那边.(副词用法)

有可与介词from连用,表示“从……的另一边”.如:

He shouted to me from across the room.他从房间的另一边向我喊。

(3)表示“交叉”(介词用法)或“从一边到另一边的宽度”(副词用法).如:

He sat there with his arms across his chest.他坐在那儿,两臂交叉放在胸前。(介词用法)

The river is half a mile across.这条河半英里宽。(副词用法)

2、不要将across误用作动词。如:

不能说:The river is too deep and we can’t across.

可改为:The river is too deep and we can’t cross.河水太深,我们过不了。

3、用于come [run] across,意为“偶然遇见”、“意外发现”(不用于被动式)。如:

Where did you come [run] across her?你在那儿碰到她的?

I’ve just come across a beautiful poem in this book.我在这本书里偶然发现一首优美的诗。

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