To invertA structure in which a verb or an auxiliary precedes the subject. E.g.: "Here comes the sun." something means to put something in the opposite position to the one it was in before. In the case of English grammar this refers to the change of the word order of the sentence, when the verbA part of speech that expresses an action or a state. E.g.: John seldom plays tennis. or an auxiliaryA helping verb used with main verbs to express mood, voice and tense. E.g.: I can't stand when I am disturbed. ("can", "am") comes before the subjectThe person or thing that performs the action of a verb or that is described by a verb. E.g.: Andy has never been to Brunei. ("Andy"). The function of inversion is usually emphasisSpecial importance or attention given to something. E.g.: All I wanna do is have some fun..

There are two types of inversion:

1. the subject and the verb change position (we call this full inversion):

On the top of the hill stood an old oak tree. (= An old oak tree stood on the top of the hill.)

2. the word order changes to the interrogativeThe sentence type used to express a direct question. E.g.: What are you doing? (question) form (we call this partial inversion):

"I like dry wines." "So do I."
Hardly had I spread my sandwich when the pizza arrived.

This kind of inversion is used in questions too:

When does the bus leave?
You’re hungry, aren’t you?

Guiding questions: inversion
Inversion Full inversion