1. 表示“比...更”，用比较级形容词+than+比较成分，表示前者“超过”后者。than后主语的述语动词往往省略，非正式用法的than后的人称代名词可用宾格。

I am a better swimmer than you (are).

我游泳比你好。

But you are taller and stronger than I (am).

但是你比我高，比我壮。

Just because you are shorter and weaker, is that the reason you become a slower swimmer than me?

仅仅因为你比我矮比我弱，就有理由比我游得慢吗？

2. 否定的比较级表示“较...低；不及...”，用less+原级形容词+than+比较成分，表示前者不及后者。

I have always tried to help those who are less fortunate than I.

我一直设法帮助比我不幸的人。

At least you are less generous than I.

至少你没有我慷慨。