初中英语知识点总结之现在完成时的句型
用于现在完成时的句型
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) Ive 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 Ive (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, its the first time I ___ here.
A. even, come B. even, have come C. 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 havent received his letter for almost a month.