英语中，“被大水冲走”可以表达为 "be swept away by a big flood" 或 "be carried away by a strong current in a flood".

在英语中，表达“被大水冲走”这一概念，我们可以使用多种不同的句式和短语，以适应不同的语境和语气。以下是一些常见的表达方式：

1. Be swept away by a big flood

   • 这种表达直接而明确，强调了洪水巨大的力量，将某人或某物冲走。例如：
     • The small boat was swept away by a big flood during the night.

2. Be carried away by a strong current in a flood

   • 这个短语侧重于描述洪水中的强大水流，如何将某人或某物带走。例如：
     • The debris was carried away by a strong current in the flood.

3. Be washed away in the flood

   • 这种说法比较口语化，直接指出某人或某物在洪水中被冲走。例如：
     • Many houses were washed away in the flood.

4. Be overwhelmed by the floodwaters

   • 这个短语强调洪水的水量之大，以至于某人或某物被淹没并冲走。例如：
     • The villagers were overwhelmed by the floodwaters and had to be evacuated.

5. Be swept off one’s feet by the flood

   • 这个表达通常用来比喻性地描述某人因为某种强烈的情感或情况而失去平衡，但在这里可以用来形象地描述被洪水冲走的情况。例如：
     • The flood swept him off his feet and he couldn’t find his way back to safety.

6. Be drowned in the flood

   • 如果某人或某物在洪水中被淹没，可以使用这个表达。例如：
     • Several people were drowned in the flood.

7. Be lost to the flood

   • 这个短语用来描述某人或某物在洪水中消失不见。例如：
     • The old bridge was lost to the flood and hasn’t been seen since.

每种表达都有其特定的情境和情感色彩，选择合适的表达方式可以使语言更加生动和贴切。