1.We haven't celebrated Christmas for 2 years.
2.The last time Linda had her teeth checked was a year ago.
3.Michelle has collected stamps since 2015.
4.Before sitting on the sofa to watch TV, Linda made a sandwich.
5.This is the fist time my nephew Lames has drunk beer.
6.David is always forgetting his books.
7.I have never watched such an exciting film like "The glass shoes" before.
8.This is the first time she has taken part in such a challenging competition.
9.How long have they started opening this shopping center?
10.After having a discussion, they ordered the food.