The sentence "Srinath missed the train today" is in the past simple tense and is affirmative. To form the correct question tag, we follow these rules:
- Identify the tense: The main sentence is in simple past tense.
- Determine the auxiliary: For past simple tense, the auxiliary verb used is "did."
- Check the sentence polarity: Since the main sentence is positive, the question tag should be negative.
Combining these steps, the appropriate tag becomes "Didn't he?" which confirms the negation of past events effectively. Thus, the correct question tag for "Srinath missed the train today" is Didn't he?