Task 4. Rewrite the following sentences changing them from the present tense to the past tense. 1. I am happy. Yesterday, I ______ happy. 2. They are at the library. → Last hour, they ______ at the library. 3. She is a good singer. → Last year, she ______ a good singer.

Перевод задания: Перепиши следующие предложения, изменив настоящее время на прошедшее.

1. I am happy. Yesterday, I was happy. (Я счастлив(а). Вчера я был(а) счастлив(а).)
2. They are at the library. Last hour, they were at the library. (Они в библиотеке. Час назад они были в библиотеке.)
3. She is a good singer. Last year, she was a good singer. (Она хорошая певица. В прошлом году она была хорошей певицей.)

Правило: В прошедшем времени am/is заменяются на was, а are — на were. (In the past tense, am/is change to was, and are changes to were.)