▲Have a drive in my new car. It is easy to start. It指代名词the car。

可以改为：The car is easy to start. 这车很容易发动。

▲在“主语 + be + 形容词 + 不定式”句型中，表面看主语和不定式是被动关系，实际上，不定式前看作是省略了一个逻辑主语，这个不定式一般表示结果状语。这时，不定式仍用主动形式。

This text is easy to recite.

John is difficult to deal with.

That box is (too) heavy to lift.

▲不定式为何不使用被动语态，是因为在不定式前省略了for sb. 这个逻辑主语。例如：

The car is easy for you to start.

如果说The car is easy for you to be started. 显然不可以。

This text is easy for us to recite.

The maths problem is difficult for a five-year-old child to solve.

这种结构中形容词说明不定式的特性。常见的此类形容词有：easy, hard, difficult, interesting, heavy, light, pleasant, comfortable, safe, dangerous, impossible, fit, soft等。