Passive voice is important for IELTS. Whenever you speak or write, or try to understand reading passages, you need to have the ability to use and understand a good range of grammar.
However, a way that the passive is specifically needed for IELTS is if you get a process diagram in Academic IELTS Task 1. In this case you will use it throughout your explanation of the process.
So first we'll take a look at how to use the passive voice generally, then we'll see how it is used in a Task 1.
When we use the active voice, the subject is doing the action of the verb:
When we use the passive voice, the person or thing receiving the action becomes the subject:
To make a sentence passive, we do three things:
The boy (new subject) was bitten (new verb form) by the dog (new object).
The boy (subject) was bitten (verb).
In this case the verb "bit" is in the past simple, so when it is made passive, the verb "to be" must be the past simple - "was".
These are examples of how we form it with different tenses (without the object in the passive):
|Present||I eat the food||The food is eaten|
|Present Continuous||I am eating the food||The food is being eaten|
|Present Perfect||I have eaten the food||The food has been eaten|
|Past||I ate the food||The food was eaten|
|Past Continuous||I was eating the food||The food was being eaten|
|Past Perfect||I had eaten the food||The food had been eaten|
|Future||I will eat the food||The food will be eaten|
|Future Perfect||I will have eaten the food||The food will have been eaten|
|Present Modal||I can eat the food||The food can be eaten|
|I should eat the food||The food should be eaten|
|I may eat the food||The food may be eaten|
|Past Modals||I could have eaten the food||The food could have been eaten|
|I should have eaten the food||The food should have been eaten|
|I may have eaten the food||The food may have been eaten|
We can also use the passive voice for infinitive and gerund structures:
to + be + Past Participle
She wanted to be taken care of
Being + Past Participle
Being taken care of was wonderful.
to + have been + Past Participle
She was happy to have been chosen
having been + Past Participle
She celebrated having been chosen
However, you cannot use the passive with intransitive verbs.
Transitive verbs have to take an object. For example, you cannot say "He discovered". This is a transitive verb so it needs an object: " He discovered a cure".
So this can be made passive: "A cure was discovered".
Intransitive verbs are not followed by an object. For example, you can say "He died". Or it could be followed by an adverb: "He died yesterday".
But we cannot say: "He was died" or "Yesterday was died he".
It is much more common to use the active than the passive, so you should only use it if there is a specific reason. Below are are the reasons that we use it.
Remember that this is usually a matter of choice for you, depending on the context in which you are writing.
1. When you think the receiver of the action is more important than the doer of the action
|Interested in the doer||Interested in the action|
2. When you think it is obvious who the doer is so it does not need to be mentioned
|An obvious subject||Omitting the doer|
3. When the doer of the action is unknown or we don't want the doer to be known
|A known doer||An unknown doer|
4. When you think the doer is irrelevant
|You feel it is relevant||You feel it is irrelevant|
5. When you are writing for certain genres, such as science reports or for academic journals
|Referring to the researcher||Anonymising the researcher|
As it is just a part of general grammar, you may use it at any point in the speaking or writing.
The time when you will really be in trouble if you don't know how to use it is if you have to write about a process in Task 1 of Academic IELTS.
Here is an example of a process diagram, where you have to describe the process of making chocolate:
When we describe a process such as this, we are not interested in who does the activity, the "doer", we are interested in the activity itself.
So in order to emphasize this, the activities are used as the subjects. Check out this model answer - the passive voice has been highlighted.
You can view some more examples of process diagrams here:
You can now test yourself with the passive voice.
In the quiz, the sentence given is active. Write the passive sentence below.
DO NOT include the object i.e. "by ...", unless you are asked to do so. If you do it will get marked as incorrect. Include everything else.
Don't put a space or full-stop (period) after your sentence as it will also appear as incorrect, and start the sentence with a capital letter.
Here is an example:
Active: I have read the book
Answer: The book has been read