as…as的用法

表示某人或某物在某一方面和另外一个人或物相同，可以使用as…as…句型。对于 as…as…句型的应用，我们应该注意以下三点：

1． as…as…句型中间应该用形容词或副词的原级（原形）。例：

This story is as interesting as that one. 这个故事和那个故事一样有趣。

David runs as fast as Jack.大卫和杰克跑的一样快。

2. 其否定形式为not as…as…或not so…as…，意为“不如……”。例：

His brother isn’t as/so strong as him.他的弟弟没有他强壮。

He doesn’t do his homework as/so carefully as Kate.他做作业不如凯特认真。

3．not as …as…可以和比较级进行转换。例：

Linda isn’t as tall as Mary.

＝Mary is taller than Linda. 琳达没有玛丽个子高。

This flower isn’t as beautiful as that one.

= This flower is less interesting than that one.

=That flower is more interesting than this one.这朵花没有那朵花漂亮。