Exceptions

Exceptions.

Of course, there are exceptions to many rules, and writers and speakers sometimes use different or unusual word order for special effects. But if we concentrate on the exceptions, we may forget the main principles, and the question of word order may start to seem very complex! So here are just a few examples: you should realise that they exist, but not try to use them unless either they are essential in the context, or else you have fully mastered normal word order patterns. (Don't try to run before you can walk!)

A few examples:

a. Never before had I seen such a magnificent exhibition.

(After never or never before, subject and verb can be - and usually are - inverted).

b. Hardly had I left the house, than it started to rain.

(When a sentence starts with hardly, subject and verb must be inverted.).

c. Had I known, I'd never have gone there.

(Inversion occurs in unfulfilled hypothetical conditional structures when if is omitted.. See the page on conditional clauses for more details)

Referensi : http://linguapress.com/grammar/word-order.htm