Поставить предложения в вопросительную и отрицательную форму: 1 I left the key in the lock. 2 My sister decided to do it herself. 3 He is busy now. 4 She helps me with my English. 5 His brother entered the college last year. 6 Ann has just received the letter. 7 I will go to the cinema tomorrow. 8 We have dinner at 7. 9 The town was founded in 1584. 10 We are picking up speed.