This is the first/last …, etc
This is the first time, etc
We use the present perfect in sentences constructed with this/it/that is the first/second/third/only/best/worst, etc.
- This is the first time that I’ve heard her sing. (not
This is the first time that I hear her sing.) - This is the first time I’ve seen a volcano. (not
This is my first time to see a volcano.) - This is the fifth time you’ve asked me the same question (not
This is the fifth time you ask …) - That’s the third cake you’ve eaten this morning.
- It’s one of the most interesting books I’ve ever read.
- I’m flying to New York tomorrow. It’ll be the first time I’ve travelled by plane.
When we talk about the past, we generally use the past perfect in these structures.
- It was the third time he had been in love that year.
Tenses with This is the last …, etc
Present (simple or progressive) and future tenses are both possible with This is the last … and similar structures.
- This is the last time I pay / I’m paying for you. (or This is the last time I’ll pay for you.)
- That’s the last email he gets / he’s getting from me. (or That’s the last email he’ll get from me.)
- This is the last thing I’m going to say to you.