He is the tallest in class.

Lucy is the most clever in her family.

The bear is the strongest.

It is the most popular design.

Where is the most painful part？

Her mouth is her best feature.

It's the latest fashion, very popular.

Jack is the tallest student in his class.

China is one of the largest countries in the world.

July is the tallest of the girls in her class.

Shanghai is the largest city in China.

She is the most beautiful girl in the world.

That tree is the tallest one in the forest.

It is the smallest.

He is the best student in my class.

It is the hottest day.

This pair of shoes is the cheapest.

It is the worst place I have been to.

这些句子简单易懂，适合六年级学生学习和使用。