Поставьте следующие предложения в отрицательную форму; переведите предложения на русский язык: 1 Put the exercise-book on the table.
2 Let him solve this equation.
3 Let the students freeze the liquid in the tube and then measure its volume.
4 Be ready for the dictation.

1. Do not put the exercise-book on the table. - Не клади тетрадь на стол.
Explanation: The original sentence "Put the exercise-book on the table" is in the imperative form, instructing someone to put the exercise-book on the table. To make it negative, we add "do not" before the verb "put" to indicate a prohibition.

2. Do not let him solve this equation. - Не позволяй ему решать это уравнение.
Explanation: The original sentence "Let him solve this equation" is in the imperative form, instructing someone to allow him to solve the equation. To make it negative, we add "do not" before the verb "let" to indicate a prohibition.

3. Do not let the students freeze the liquid in the tube and then measure its volume. - Не позволяйте ученикам замерзать жидкость в пробирке, а затем измерять ее объем.
Explanation: The original sentence "Let the students freeze the liquid in the tube and then measure its volume" is in the imperative form, instructing someone to allow the students to freeze the liquid and measure its volume. To make it negative, we add "do not" before the verb "let" to indicate a prohibition.

4. Do not be ready for the dictation. - Не будь готовым к диктанту.
Explanation: The original sentence "Be ready for the dictation" is in the imperative form, instructing someone to be prepared for the dictation. To make it negative, we add "do not" before the verb "be" to indicate a prohibition.