LANGUAGE FEATURES
1. Use simple past tense.
(+) V2 .e.g. walked, ran, turned into, swallowed, etc.
(-) did not + V1 .e.g. did not allow, did not admit, etc.
(?) Did + subject + V1 .e.g. Did he remember me?
2. Use temporal conjunction.
Once upon a time, one day, a long time ago, etc.