"But" is a conjunction. Prepositions are in, at, on, of, etc.
It is not wrong to use "I".
not a teacher
In the OP's sentence, "but" is a preposition, so "I" would be incorrect.
Click on the speaker icon in orange on http://xh.5156edu.com/html3/5844.htmlBy the way, how do you say 嘟嘟嘟嘟?
'Original poster' is similar to “楼主” in the OP's native language.It means 'original poster'.
What does OP mean?In the OP's sentence, "but" is a preposition, so "I" would be incorrect.