Tom is shorter than Tim.

翻译：汤姆比蒂姆矮。

The red ruler is shorter than the blue one.

翻译：这支红色的直尺比蓝色的那支短。

I am shorter than my sister, but I am taller than my brother.

翻译：我比我姐姐矮，但我比我哥哥高。

My ruler is shorter than your.

翻译：我的尺子比你的短。

She is taller and he is shorter.

翻译：她高些而他矮些。

shorter hemlines are back in this season.

翻译：本季又重新时兴较短的衣裙。

Today's slightly shorter race could well help to tip the scales in her favour.

翻译：今日稍短程的比赛将很有可能使她稍占优势。

这些造句涵盖了不同的比较情境，适合六年级学生使用。希望这些例子对你有所帮助!