Переведите предложения. постройте отрицательную, вопросительную или повествовательную формы: i can work in ms-dos. may we come in? you should not open the window. he must save the document. you might take the book. mozart could play the piano at the age of five. you had to keep it a secret. he needn’t come early.

1. Я могу работать в MS-DOS.
Can I work in MS-DOS?
I can't work in MS-DOS.

2. Можем ли мы войти?
We can come in.
We can't come in.

3. Тебе не следует открывать окно.
You should open the window.
Should you open the window?

4. Он обязан сохранить документ.
He mustn't save a document.
Must he save a document?

5. Ты можешь взять книгу.
Might you take a book?
You not might take a book.

6. Моцарт мог играть на фортепиано в возресте пяти лет.
Could Mozart play the piano at the age of five?
Mozart couldn't play the piano at the age of five.

7. Ты должен был сохранить этот секрет.
You hadn't to keep it secret
Had you to keep it secret?

8. Ему не нужно приходить рано.
He need to come early.
Do he need to come early?