The third conditional is the most feared grammar point I know. Students of English think that it’s hard to form and understand. Therefore, when they start learning the grammar they are paralysed with fear. And as a result, they fail to learn it. Thus the third conditional keeps its reputation.
Third conditional – song
Here is a short worksheet that will help you introduce the grammar:
Third conditional – infographic
You can download the full image here:
Next, explain the meaning of the third conditional. Tell your students that the if-clause of the conditional speaks about a situation in the past that did not happen. The second part of the sentence expresses our hypothesis about what could have happened if the first part of the sentence were true. In both parts we speak about the past, and none of the actions happened. The ideas expressed in the third conditional are about the past and they never happened.
Now, ask your students to form three third conditional sentences using the clues in the infographic and to describe the situations in which they might be used. For example: Martina went to a party yesterday. She got drunk and the police arrested her. If she had stayed at home, nothing of this would have happened.