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.

1 I didn't leave the key in the clock.
Did I leave the key in the clock?
2 My sister decided not to do it herself.
Did my sister decided to do it herself?
3 Is he busy now?
He isn't busy now.
4 Does she help me with my English?
She doesn't help me with my English.
5 Did his brother enter the college last year?
His brother didn't enter the college last year.
6 Has Ann just received the letter?
Ann hasn't just received the letter.
7 Will I go to the cinema tomorrow?
I won't go to the cinema tomorrow.
8 We don't have dinner at 7 o'clock.
Do we have dinner at 7 o'clock?
9 The town wasn't founded in 1584.
Was the town founded in 1584.
10 Are we picking up speed?
We aren't picking up speed.