1.This is the first time I have written such a long letter.
2.That’s the first time I’ve seen such a bad cartoon as that one
3.It's the first time I’ve had such an exciting holiday.
4.This's the first time she has bought such an expensive gift for me.
5.This is the first time they have experienced such a terrible situation.
7.Those are the first time we have eaten such good cakes in our life.
8.I’ve never worked with the most intelligent boys.