幼儿园到小学阶段的儿童都在学习自然拼读教材，大多数教材都会从字母发音开始学习，在此基础上学习短元音和长元音，高级阶段的自然拼读会学习福音字母组合和元音字母组合的发音规则。

在元音字母组合发音规则学习中，有一类被称为受r控制的元音字母发音规则，主要涉及的是ar er ir or ur的发音规则。一般情况下ar在单词中的读音为/ar/，被称为bossy r，其中的字母r强势却不失礼貌，之前的元音字母一般不发本音。

常见的字母含有字母ar的单词有

下面的一些句子中都含有ar读音的单词，学生们可以练习读音。

Mark is smart and does not jab the shark.

My car is dark blue.

Mom has a jar of jam.

There are lots of stars in the dark sky.

Does the shark have a scar?

The farm has a big yard.

How far did you march?

I hit my arm on a hard rock.

Clark is an artist.

Mark’s dad is smart.

Did Carl's dart hit the target?

We have a garden on our farmyard.

Is it hard to pick up a barbell?

Is it smart to disarm a cop?

Carl sat on the carpet and read the card.

The dog in the barn barks and barks in the dark.

Carl put the tart in the pushcart.

The artist hung the star on the ark.

自然一些单词中的ar读音也和普通读音不同，这些词语包括：