the+最高階+比較範圍

　　1) The Sahara is the biggest desert in the world.

　　形容詞最高階前通常必須用定冠詞 the，副詞最高階前可不用

一般來說，最高階前面可以叫上定冠詞the，比如：the most important最重要的。也有不加定冠詞的時候，比如最高階前面有有形容詞性物主代詞的時候，不能加定冠詞the，比如：my most precious gift.我最珍貴的禮物。

This is the best way to teach English.

This is the best gift that I have ever received.

This is the most important thing that we should keep in mind.