5 Circle the correct alternative. 1 You should drink/to drink milk, it's good for you. 2 She shouldn't/should eat fruit and vegetables. 3 When should/shouldn't I mix the sugar with butter? 4 You should/shouldn't visit that museum. It's very interesting. 5 Little children should wear/wearing a hat in the sun. 6 He should/shouldn't drive so fast. It's not safe.

Правило использования 'should'/'shouldn't':

После модальных глаголов 'should' и 'shouldn't' используется инфинитив глагола без частицы 'to'. Исключение составляет глагол 'to be', но в данном случае он не используется.

Ответы:

1. You should drink milk, it's good for you. (После 'should' идет инфинитив без 'to').
2. She should eat fruit and vegetables. (Это рекомендация, хорошая идея).
3. When should I mix the sugar with butter? (Вопрос о совете или рекомендации).
4. You should visit that museum. It's very interesting. (Рекомендация, так как это интересно).
5. Little children should wear a hat in the sun. (После 'should' идет инфинитив без 'to').
6. He shouldn't drive so fast. It's not safe. (Совет избегать опасного действия).