532　It's best to do sth., It's better to do sth. than和the best time to do sth.

1　It's best to do sth. 意为“最好做某事”，这个句型中的it是形式主语，不定式to do sth.是真正主语，可以转换为to do sth. is best结构。

It's best to leave tomorrow. 最好明天就动身 。

To leave tomorrow is best.

It's best to read the book again. 最好把这本书再读一遍 。

To read the book again is best.

2　It's better to do sth. than to do sth. 意为“做什么比做什么好”。这种句型中的it也是形式主语，代替真正主语to do sth.，可以转换为to do sth. is better than to do sth.。

It's better to borrow than to buy. 借比买好 。

To borrow is better than to buy .

It's better to stay here than to go there. 待在这里比去那里好 。

To stay here is better than to go there.

It's better to stay here than go there. （误） （两个不定式相比较，都应该加to ）

3　the best time to do sth. 意为“做某事的最佳时候”，这种结构中的不定式作定语，修饰the best time。不定式常用作后置定语。

The best time to come to Nanjing is in autumn. 来南京的最佳时间是秋天。

The best time to read English is in the morning. 读英语的最佳时间是早晨。

He is the first man to climb up the mountain. 他是第一个爬上那座山的人。

She is the last to leave . 她是最后一个离开的人。