AFFIRMATIVE: There are two types of verbs:
a) regular : verb + ed
b) irregular verbs: pages 115-116
NEGATIVE: DIDN'T + VERB
INTERROGATIVE: DID + SUBJECT + VERB
REMEMBER:
In negative and interrogative sentences the verb doesn't change, it
doesn't matter if it is regular or irregular, it stays in the base form.
AFFIRMATIVE Exercise 1, exercise 2, exercise 3
NEGATIVE Exercise 1, exercise 2, exercise 3
INTERROGATIVE Exercise 1, exercise 2, exercise 3
MIXED EXERCISE Exercise 1, exercise 2, exercise 3 THERE WAS//THERE WERE