Passive Voice and Causative

ANSWERS 1: TO AVOID BEING HEARD
EXPLANATION
PASSIVE VOICE => AVOID + GERUND + PAST PARTICIPLE
More Examples:
She doesn't mind being compared to Madonna. DON'T MIND + GERUND + PAST PARTICIPLE
My children like being taken to the cinema. LIKE + GERUND + PAST PARTICIPLE

ANSWERS 2: IS BELIEVED TO HAVE BEEN
EXPLANATION
PASSIVE VOICE => PERSONAL/IMPERSONAL
More Examples:
People say that he was a good student. => He is said to have been a good student.
People think that she is living in France. => She is thought to be living in France.

ANSWERS 3: HAD HIS VAN STOLEN
EXPLANATION
HAVE SOMETHING DONE (CAUSATIVE)
More Examples:
I had my house cleaned. V SUBJECT + HAD + OBJECT + PAST PARTICIPLE
I had cleaned my house. X

ANSWERS 4: WERE THE HOUSES DECORATED WITH
EXPLANATION
PASSIVE VOICE (QUESTION)
More Examples:
How many elements is this model composed of? QUESTION WORD + AUXILIARY + SUBJECT + PAST PARTICIPLE
Has the mystery been cleared up yet? AUXILIARY + SUBJECT + PAST PARTICIPLE

ANSWERS 5: GOT ATTACKED BY
EXPLANATION
GET + PAST PARTICIPLE
More Examples:
John got stuck in the mud. GOT + PAST PARTICIPLE (PAST SIMPLE)
The cake is getting frosted. IS GETTING + PAST PARTICIPLE (PRESENT CONTINUOUS)

ANSWERS 6: HAVE THE ELECTRICIAN INSTALL
EXPLANATION
HAVE + OBJECT + BARE INFINITIVE => ASK/GIVE SOMEONE ELSE THE RESPONSIBILITY TO DO SOMETHING:
More Examples:
I'll have the secretary type the letters. V HAVE + OBJECT + BARE INFINITIVE
I'll have the secretary typed the letters. X