Answer:
The correct answer is: 1. passive/2. active/3. passive/4. active
Explanation:
Passive voice is used to take away the focus of the subject onto the object. It's written using the verb to be and the past participle of the main verb of the sentence. Sometimes it can be followed by a 'by phrase' to indicate who the action-doer was.
The two homes were broken into...
Object: the two homes
Verb to be: were
Past participle: broken into
In this particular sentence the subject is obvious (burglars) so the by-phrase is not needed.
The neighbor's tulips were trampled last night by my new puppy.
Object: the neighbor's tulips
Verb to be: were
Past participle: trampled
Time: last night
Subject: my new puppy
In this other passive sentence though we know who performed the action, the importance is focused on the action: the tulips were ruined.
