读幽默对话,⑴TEACHER:Ellen,give me a sentence starting with“I”.ELL

读幽默对话,
⑴TEACHER:Ellen,give me a sentence starting with“I”.
ELLEN:I is...
TEACHER:No,Ellen.Always say,“I am.”
ELLEN:All right...“I am the ninth letter of the alphabet.”
Is the sentence Ellen made right?Why?
⑵SILVIA:Dad,can you writer?
FATHER:I think so.What do you want me to wrire?
SILVIA:Your name on this report card.
Why does Silvia ask this question?