As is often followed by so. “As thy days, so shall thy strength be.”
So... as
In such negative assertions as, “This is not as fine a tree as that,” the first as should be changed to so. Say, “She is not so handsome as she once was.” “This edition of Tennyson is not so fine as that.”
Either, Neither
The correlatives either, or, and neither, nor, are employed when two objects are mentioned; as, “Either you or I must go to town to-day,” “Neither James nor Henry was proficient in history.”
“He neither bought, sold, or exchanged stocks and bonds.” The sentence should be, “He neither bought, sold, nor exchanged stocks and bonds.”
“That is not true, neither.” As we already have one negative in the word not, the word neither should be changed to either, to avoid the double negation.
A negative other than neither may take either or or nor as its correlative, “She was not so handsome as her mother, or so brilliant as her father.” “He was never happy nor contented afterward.”
The placing of correlatives requires care. “He not only gave me advice, but also money.” This is a faulty construction because the first member of the correlative, not only, being placed before the verb gave leads us to expect that the action of giving is to be contrasted with some other action. The close of the sentence reveals the fact that the words advice and money represent the ideas intended for contrast. The first correlative should, therefore, have been placed before advice, and the sentence should read, “He gave me not only advice, but also money.”