comparative?adjectives：
比較級：

We use comparative?adjectives to describe people and things:
我們用比較級形容詞來描述人或物：

This car is certainly better but it’s much more expensive.

I’m feeling happier now.

We need a bigger garden

We use than when we want to compare one thing with another:
當我們想要比較兩種物體時，我們用than：

She is two years older than me.

New York is much bigger than Boston.

He is a better player than Ronaldo.

France is a bigger country than Britain.

When we want to describe how something or someone changes we can use two comparatives with and:
當我們想要描述某物或某人的改變時，我們可以用兩個比較級來描述：

The balloon got bigger and bigger.

Everything is getting more and more expensive.

Grandfather is looking older and older.

We often use the with comparative adjectives to show that one thing depends on another:
我們經(jīng)常用the和比較級形容詞一起來表現(xiàn)某物依賴于某物：

When you drive faster it is more dangerous

> The faster you drive, the more dangerous it is.

When they climbed higher it got colder
> The higher they climbed, the colder it got.

Superlative adjectives:
最高級

We use the with a superlative:
我們用the與最高級連用：

It was the happiest day of my life.

Everest is the highest mountain in the world.

That’s the best film I have seen this year.

I have three sisters, Jan is the oldest and Angela is the youngest . ?