6. Напишите следующие предложения в вопросительной и отрицательной формах: 1) There are some extra chairs in the next room. 2) He made some mistakes in spelling. 3) They have some pretty dresses in that store. 4) The teacher taught us some important rules of grammar. 5) We learned some new words in class yesterday. 6) There are some flowers in the yellow vase.