Regular un-inverted English word order is: subject – verb – object
Question word order is: WH words – auxiliary – subject – verb object
“Inverted” word order looks like question word order in that there is an auxiliary before the subject.
Regular: She goes home.
Question: When does she go home?
Inverted: Not only does she go home early, but she comes late too!
Regular: They have seen it.
Question: How many times have they seen it?
Inverted: Seldom have they seen it so wet.
Good explanation, but no practice:
Explanation and practice:
Practice (do on paper):