1）It is the first / second time…… that…結(jié)構(gòu)中的從句部分，用現(xiàn)在完成時(shí)。例如：
It is the first time that I have visited the city. 這是我第一次訪問(wèn)這城市。
This is the first time （that） I've heard him sing. 這是我第一次聽(tīng)他唱歌。
注意：It was the third time that the boy had been late.
2）This is +形容詞級(jí)+that…結(jié)構(gòu)，that 從句要用現(xiàn)在完成時(shí)。例如：
This is the best film that I've （ever） seen. 這是我看過(guò)的的電影。
典型例題
（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 后面所加從句應(yīng)為現(xiàn)在完成時(shí)，故選B.
（2） ——Have you ____ been to our town before？
——No， it's the first time I ___ here.
A. even， come B. even， have come C. ever， come D. ever， have come
答案D. ever意為曾經(jīng)或無(wú)論何時(shí)，反意詞為never，此兩詞常用于完成時(shí)。
注意：非延續(xù)性動(dòng)詞的否定形式可以與表示延續(xù)時(shí)間的狀語(yǔ)連用。即動(dòng)作不發(fā)生的狀態(tài)是可以持續(xù)的。
（錯(cuò)）I have received his letter for a month.
（對(duì)）I haven't received his letter for almost a month.