They did create/created the first representative government.
Which one is better? Different non-native people think differently.
They did create/created the first representative government.
Which one is better? Different non-native people think differently.
The verb the "do" is supporting remains unconjugated, in its bare infinitive.
They did create the first representative government.
https://en.wikipedia.org/wiki/Do-support
https://en.wikipedia.org/wiki/Uses_of_English_verb_forms#Bare_infinitive
do/did if followed by an unmarked infinitive when you use it for emphasis, s the correct sentence is:
They did create the first representative government.