When adjectiveA part of speech that modifies, qualifies or restricts a noun or a pronoun. E.g.: The apples are ripe. ("ripe") and adverbA part of speech that modifies verbs, adjectives, adverbs and conjunctions. E.g.: I could hardly utter a word. ("hardly")ial phrases starting with so and such are moved to the beginning of a sentence for emphaticSpecial importance or attention given to something. E.g.: All I wanna do is have some fun. effect, partial inversionA structure in which a verb or an auxiliary precedes the subject. E.g.: "Here comes the sun." is used.

So quickly did he run that the others couldn’t catch up with him. (He ran so quickly that the others couldn't catch up with him.)

So strong was the wind that we couldn’t open the window. (The wind was so strong that we couldn't open the window.)

The second sentence above can be rephrased using such. In this case such means so great:

Such was the wind that we couldn’t open the window. (The wind(‘s force) was such that we couldn't open the window.)

Partial inversion
Partial inversion Partial inversion after negative adverbials