最高级的前面通常要加定冠词，副词最高级前面的定冠词可以省略。最高级在使用时通常有一个短语或从句表示比较的范围。

Of all the places I've visited， I like Hangzhou best.

This is the worst movie I've ever seen.

Beijing is one of the largest cities in the world.

For me， Tuesday is one of the busiest day in the week.

Among all the students， he runs (the) fastest.

比较级前面有时也加the ，表示两者之间“较…的一个”。

Both of the two girls are beautiful， but I think the tall one is more beautiful of the two.

The five-year-old boy chose the more expensive of the two toys.