Ответ:

1 *didn't laugh*

2 *wanted*

3 *Why didn't you bring *

4 *asked*

5 *didn't answer*

6 *didn't do*

7 *did*

8 *didn't feel*

9 *took*

10 *didn't seem*

11 *gave*

12 *turned*

13 *knew*

14 *came*

15 *didn't go*

16 *didn't understand*

17 *What didn't he do*

18 *didn't care*

19 *didn't say*

20 *returned*

Объяснение:

Past Simple - простое прошедшее время. Образуется с помощью окончания -ed или 2 форма неправильного глагола (смотрим по таблице)

Отрицание "didn't +1 форма" без to

Вопрос "did + 1 форма" без to