Answer:
I think a simile because it is comparing?
1. Barry-if you could believe him-told us that he would help!
2. Math, science, and social studies are all subjects I enjoy.
3. The speakers-each spoke on a different subject-were superb.
4. The teacher would not change the due date to Friday at 10:00.
Answer:
Metaphor
Explanation:
To write a metaphor is to compare something without using "like" or "as" (using "like" or "as" would be a simile).
In this sentence, the speaker is comparing John to a snake.