399　it be+形容词比较级+不定式

◎ 本句型中的it为形式主语，代替后面的不定式，意为“做……更……些”。这种结构中的形容词前还可用much修饰，进行强调。

It is better to take a holiday. 休一次假更好。

It will be better to give up the job. 放弃那份工作会更好。

It is（much）more difficult to climb to the top of the mountain. 爬到山顶会更难。

It is wiser to look before you jump. 看了才跳更明智。

It will be more difficult to go down the hill. 下山会更难。