INVERSION

Inversion

Use of question form
In this case, the question form (auxiliary + Subject + main verb)takes the place of standart positive sentence structure, (ex : He goes to school)

Examples:
1. Not only do I enjoy the game, but I also have a free ticket to the next game
2. seldom has the boss been so upset!

in this case, the question form is subtituted for standart sentence structure in a statement. Generally, an inversion is used to stress the uniqueness of an event and begin with the negative.

Time expressions : rarely, seldom, never
These time expressions are used with a perfect form or with modals and often include comparative.
examples:
1. Never have I been more insulted!
2. Seldom has he seen anything stranger

Time expressions : no sooner, hardly, scarcely, barely
These time expressions ure used when there are a succession event in the past.
examples :
1. Scarcely had I got out of bed when the doorbell rang.
2. No sooner had he finished dinner, when she walked in the door.

After "only" expressions such as, "only after","only when", "only then", etc
"only" is used with a time expression.
examples :
1. Only than did I understand the problem.
2. Only after understanding the situation does the teacher make a comment.

After "litle"
"litle" is used in a negative sense.
examples :
1. Litle did He understand the situation.
2. Litle have I concerning nanotechnology

Inversion after "so", "such" and "That"
"so"
So + Adjective......that (combines with the verb to be)
examples :
1. So strange was the situation that I couldn't sleep
2. So difficult is the test that student need three months to prepare.

"Such"
So + to be + noun....(that)
examples :
1. Such is the moment that all greats traverse.
2. Such is the stuff of dreams.

Inverted conditional form
Sometime conditional forms are inverted as a means of sounding more formal.
In this case, the conditional "if" is dropped and the inverted forms takes the place of the "if clause".
examples :
1. Had He understood the problem, he wouldn't have committed those mistakes.
2. Should He decide to come, please telephone.