1. Use Past Simple forms of the verbs: Simpsons / watch / TV last week, 1. affirmative Simpsons watched TV last week.
2- negative Simpsons didn't watch TV last week.
3- interrogative Did Simpsons watch TV last week?
your sister
A) My sister / tidy / her room yesterday.
1- My sister
her room yesterday.
2- My sister
her room yesterday.
3-
her room yesterday?
B) We/live/in London last summer.
1. We
in London last summer.
2- We
in London last summer.
3-
you
in London last summer?
C) Sandra and Elsa / talk / on the phone last night.
1. Sandra and Elsa
on the phone last night.
2- Sandra and Elsa
on the phone last night.
3-
Sandra and Elsa
on the phone last night?

1. affirmative: My sister tidied her room yesterday.
Explanation: We form the past simple of the verb "tidy" by adding "-ed" to the base form. In this case, the base form is "tidy". The subject of the sentence is "my sister". Therefore, we say "My sister tidied her room yesterday" to indicate that she cleaned her room in the past.

2. negative: My sister didn't tidy her room yesterday.
Explanation: To form the negative past simple, we use the auxiliary verb "did" in its past tense form "didn't", followed by the base form of the verb "tidy". So, we say "My sister didn't tidy her room yesterday" to indicate that she did not clean her room in the past.

3. interrogative: Did my sister tidy her room yesterday?
Explanation: To form the interrogative past simple, we begin the sentence with the auxiliary verb "did" in its past tense form "Did". Then, we add the subject "my sister", followed by the base form of the verb "tidy". So, we ask "Did my sister tidy her room yesterday?" to inquire whether she cleaned her room in the past.

B) We lived in London last summer.
1. We lived in London last summer.
Explanation: The base form of the verb "live" is also "live". Therefore, we simply say "We lived in London last summer" to indicate that we resided in London during the previous summer.

2) We didn't live in London last summer.
Explanation: To form the negative past simple, we again use the auxiliary verb "did" in its past tense form "didn't", followed by the base form of the verb "live". So, we say "We didn't live in London last summer" to state that we did not reside in London during the previous summer.

3) Did you live in London last summer?
Explanation: To form the interrogative past simple, we start the sentence with the auxiliary verb "did" in its past tense form "Did". Then, we use the subject "you", followed by the base form of the verb "live". So, we ask "Did you live in London last summer?" to inquire whether you resided in London during the previous summer.

C) Sandra and Elsa talked on the phone last night.
1) Sandra and Elsa talked on the phone last night.
Explanation: The base form of the verb "talk" is "talk". Therefore, we say "Sandra and Elsa talked on the phone last night" to indicate that they had a conversation on the phone in the past.

2) Sandra and Elsa didn't talk on the phone last night.
Explanation: To form the negative past simple, we use the auxiliary verb "did" in its past tense form "didn't", followed by the base form of the verb "talk". So, we say "Sandra and Elsa didn't talk on the phone last night" to state that they did not have a conversation on the phone in the past.

3) Did Sandra and Elsa talk on the phone last night?
Explanation: To form the interrogative past simple, we begin the sentence with the auxiliary verb "did" in its past tense form "Did". Then, we use the subjects "Sandra and Elsa", followed by the base form of the verb "talk". So, we ask "Did Sandra and Elsa talk on the phone last night?" to inquire whether they had a conversation on the phone in the past.