Questions & Answers about Я кашлянул и взял салфетку.
Yes, Russian often omits subject pronouns when the subject is obvious from the verb form or context. So Кашлянул и взял салфетку can be natural in context.
Here, я is included for clarity, emphasis, or simply because the speaker chooses to say it. It is not wrong at all. Including я can make the sentence feel a bit more explicit, especially if the speaker is introducing their own action.
Кашлянул is the perfective form and usually means gave a cough / coughed once — a single, brief action.
Кашлял is imperfective and suggests a process, repeated coughing, or just the general fact of coughing.
So:
- Я кашлянул = I coughed once
- Я кашлял = I was coughing / I coughed repeatedly
In this sentence, кашлянул fits because it presents one completed action followed by another completed action: coughed and took a tissue.