fewer作形容詞意為“較少的”、“不多的（few的比較級）”、“很少”、“（與復數名詞和復數動詞連用）有些”，所以fewer修飾可數名詞。

few的用法

1.（與復數名詞和復數動詞連用）不多，很少

（1）Few people understand the difference.

很少有人了解這個差別。

（2）There seem to be fewer tourists around this year.

今年來訪的旅游者似乎少了。

（3）Very few students learn Latin now.

現在學拉丁語的學生少得很。

2.a few（與復數名詞和復數動詞連用）有些，幾個

（1）We've had a few replies.

我們已得到了一些答復。

（2）I need a few things from the store.

我需要從商店買些東西。

（3）Quite a few people are going to arrive early.

相當多的人打算早到。

（4）I try to visit my parents every few weeks .

我盡量每隔幾個星期看望一次父母。

fewer的用法

（1）The report shows that fewer couples are getting hitched.

報告顯示，結婚的人數呈下降趨勢。

（2）We need fewer organizers and more doers.

我們需要的是少些組織者，多些實干者。

（3）He was advised to smoke fewer cigarettes and drink less beer.

有人勸他少抽煙、少喝啤酒。