Answer:
My teachers' pen.
Explanation:
The possessive of plural nouns ending in s is formed by adding an apostrophe after the s. In this case, a pen belonging to your teacher would be written as My teachers' pen.
I hope this helps.
metaphor If this is like the other question I saw
You can do it just read it on your own and if u want me to answer it just inform me :)
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I hope that helps, maybe