across 完整说明

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 can 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.(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.(去掉a)

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 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.