https://online1.tingclass.net/lesson/shi0529//0005/506/9968.mp3
https://image.tingclass.net/statics/js/2012
In the classroom the teacher is asking a student to do something.
Teacher: Tell me a sentence that starts with "I."
Student: I is the ...
Teacher: Stop! Never put "is" after "I." Always put 'am' after "I."
Student: OK. I am the ninth letter of the alphabet.