Question

Change the voice:
Ann has invited some of Ann’s friends to her flat.
a) Some of her friends were invited by her to her flat.
b) Some of Ann’s friends have been invited by her to her flat.
c) Some of Ann’s friends are invited by her to her flat.
d) Some of Ann’s friends had been invited by her to her flat.

Answer 1

Hint: In active voice, the subject performs the action, however, in the passive voice, the subject is placed at the end of the sentence. It is not outrightly visible, nor is it a command.

Complete answer:
 Let us first understand what active and passive voices are.
Active voice means that the given sentence has a subject that performs its verb. In short, this means that the subject is visible or is present in the sentence. For example, in the given question, the sentence ‘Ann has invited some of Ann’s friends to her flat’, the subject is Ann, and the object is ‘her friends’.

Passive voice means that a subject is in place of an object, i.e. a recipient of a verb’s action. This means that the subject is not outrightly seen. It is usually there but is considered invisible. At the end of a passive voice sentence, to make the subject seen, you just add ‘by someone’. This becomes the default subject.

In order to convert the active voice into passive voice, all you need to do is change the order of the parts of speech. So, the ‘subject + verb + object’ in active voice changes to ‘object + verb + (subject)’ in the passive voice.

Now, we know what we are looking for. Let’s look at the given options-
a)Some of her friends were invited by her to her flat. - This sentence is also in the passive voice, however, it is grammatically inconsistent as the tense does not match the given question. This is not the required answer. So, this is an incorrect option.
b) Some of Ann’s friends have been invited by her to her flat. - This sentence is in the passive voice, and the tense and verb match the subject. This is the required answer. So, this is the correct option.
c) Some of Ann’s friends are invited by her to her flat. - This sentence is also in the passive voice, however, it is grammatically inconsistent as the tense does not match the given question. This is not the required answer. So, this is an incorrect option.
d) Some of Ann’s friends had been invited by her to her flat. - This sentence is also in the passive voice, however, it is grammatically inconsistent as the tense does not match the given question. This is not the required answer. So, this is an incorrect option.

Note:
 Understand the concepts of active and passive voice. It is easier to understand it with the given examples. Then, go through the given options and see which ones best fit the description of passive voice. Choose the correct option accordingly.