Pronoun dropping

From Teflpedia

Pronoun dropping occurs when a pronoun is dropped (ellided) from a text.

In English, it is fairly common in informal speech, and note-taking, where the referent is obvious.[1]

Because of the conjugation of "be", Am implies I am, "is" implies "he/she/it is", etc.

Students with a pro-drop L1, such as Chinese, often drop pronouns due to L1 transfer. This generally doesn't hamper communication, but sounds really wierd to a native English speaker. A failsafe rule is "if in doubt, don't drop a pronoun", since a superfluous pronoun is a minor innocuous superfluity that few would even notice, let alone care about, but an incorrectly dropped pronoun is an error.