Hello, Janissary,
1.
If a clause begins with a negative adverb, inverted word order must usually be used, with the subject following the Simple Present or Simple Past of the verb to be, or the first auxiliary. In the case of the Simple Present or Simple Past of any verb other than the verb to be, the auxiliary to do must be used. This construction is summarized below, followed by examples.
Simple form of
negative adverb + verb to be or + subject
or adverb phrase first auxiliary
Never before was I so eager to reach home.
Little did we think we would meet again.
Seldom had they tasted such a delicacy.
Following are other examples of this type of construction. The negative adverbs and adverb phrases are printed in bold type, and the subjects of the verbs are underlined.
Seldom was he at a loss for words.
Scarcely had we left the house, when it began to rain.
Not for many years was the true story known.
No sooner did the bell ring than the children ran out of the school.
In the first example, the subject he follows was, the Simple Past of the verb to be. In the succeeding examples, the subjects we, story and bell follow the auxiliaries had, was and did, respectively.
2.
When used with a verb of motion, an adverb or adverb phrase of location may be placed at the beginning of a clause, followed immediately by the verb, followed by the noun subject of the verb. This construction is summarized below, followed by examples.
adverb phrase verb of noun
of location + motion + subject
Up the hill trundled the train.
Here come our friends.
If the subject of the verb is a personal pronoun, the subject must precede the verb, as illustrated below:
adverb phrase pronoun verb of
of location + subject + motion
Up the hill it trundled.
Here they come.
(From http://www.wordpower.ws/grammar/gramch24.html#2g2.)