1）It is the first / second time…… that…结构中的从句部分，用现在完成时。例如：

It is the first time that I have visited the city. 这是我第一次访问这城市。

This is the first time （that） I’ve heard him sing.这是我第一次听他唱歌。

注意：It was the third time that the boy had been late.

2）This is +形容词最高级+that…结构，that 从句要用现在完成时。例如：

This is the best film that I’ve （ever） seen. 这是我看过的最好的电影。

典型例题

（1） ——Do you know our town at all？

——No， this is the first time I ___ here.

A. was B. have been C. came D. am coming

答案B. This is the first time 后面所加从句应为现在完成时，故选B.

（2） ——Have you ____ been to our town before？

——No， it’s the first time I ___ here.

A. even， come B. even， have comeC. ever， come D. ever， have come

答案D. ever意为曾经或无论何时，反意词为never，此两词常用于完成时。

注意：非延续性动词的否定形式可以与表示延续时间的状语连用。即动作不发生的状态是可以持续的。

（错）I have received his letter for a month.

（对）I haven’t received his letter for almost a month.