Answer and explanation:
A metaphor is a figure of speech that makes a comparison between two different things without using supporting words - "like" or "as". The intention is to attribute a quality belonging to one of those things to the other. When using this figure of speech, the speaker states that "thing A is thing B". The literal meaning would be strange, making no sense. But, when we think of it figuratively, we can see the speaker is merely comparing the two things mentioned to state a quality or characteristic.
So, if we wish to say that wasting time is bad, we can compare the action of wasting time to something that everyone would see as bad, such as a demon. The metaphor would be:
- Wasting time is a demon.
Also, if we aim to claim that the accident taught us to be more careful when we cross the street, we can compare the accident to someone who clearly teaches something. Thus:
- The accident was my teacher.
