Non-native speaker here, I'm confused with the usage of past tense in English.
For example when someone say 'World War 3 didn't happen', why the word 'did' is used here? In my understanding, past tense is used to describe things that happened in the past.
Another example would be 'I almost bought that game', why do we need to use the word 'bought' instead of 'buy'?
Any response will be appreciated and apologize for bad english.