II. Rewrite the sentences in Passive.

1) They play tennis twice a week.

2) I wear sandals in the summer.

3) Young people read teen magazines.

4) She invites all her friends to the party.​

Sure, I can help you with that. Here are the rewritten sentences in the passive voice, along with step-by-step explanations:

1) Tennis is played twice a week by them.
Explanation: In the original sentence, the subject "they" was performing the action "play tennis." In the passive voice, the subject becomes the receiver of the action, so "tennis" becomes the subject and "is played" is used to show that the action is being done to it. "By them" is added to indicate who is doing the action.

2) Sandals are worn by me in the summer.
Explanation: In the original sentence, the subject "I" was performing the action "wear sandals." In the passive voice, the subject becomes the receiver of the action, so "sandals" becomes the subject and "are worn" is used to show that the action is being done to them. "By me" is added to indicate who is doing the action.

3) Teen magazines are read by young people.
Explanation: In the original sentence, the subject "young people" was performing the action "read teen magazines." In the passive voice, the subject becomes the receiver of the action, so "teen magazines" becomes the subject and "are read" is used to show that the action is being done to them. "By young people" is added to indicate who is doing the action.

4) All her friends are invited to the party by her.
Explanation: In the original sentence, the subject "she" was performing the action "invites all her friends." In the passive voice, the subject becomes the receiver of the action, so "all her friends" becomes the subject and "are invited" is used to show that the action is being done to them. "By her" is added to indicate who is doing the action.

By using the passive voice, attention is shifted from the doer of the action to the receiver. The structure "be + past participle" is used to form the passive voice, and the prepositional phrase "by" is added to indicate the doer of the action.