Какие правила присутствуют в этих предложениях? 1.Where are you from? 2.When does your friend? 3.How many chairs are there in the classroom? 4.Nick is taller than his friend. 5.I think winter is the most beautiful season. 6.There is a letter,a pen and anenvelope on the table. 7.There are a lot of pencils in the pencil-box. 8.show me this shorts,please.

present simple, past simple