I. rewrite the following sentences

1) this is the first time I have talked to him

2)she has never talked to a stranger before

3) he has never made a mistake before

4) we have never met him before

5) this is the first time Tring has swim in the pool

`I` :

`1.`I have never talked to him before.

`2.`This is the fisrt time she has talked to a stranger.

`3.`This is the first time he has made a mistake.

`4.`This is the first time we have met him.

`5.`Tring has never swum in the pool before. 

`=>`Form : This/It is the first time + S + have/has + Vpp : Đó là lần đầu tiên ai làm gì...

`=`S + have/has never + Vpp + before : Ai chưa từng làm gì trước đây...