His voice ... sounded as though it came out of a barrel.—Irving.
Blinded alike from sunshine and from rain,
As though a rose should shut, and be a bud again.
—Keats
Examples might be quoted from almost all authors.
As for as if.
303. In poetry, as is often equivalent to as if.
And their orbs grew strangely dreary,
Clouded, even as they would weep.
—Emily Bronte.
So silently we seemed to speak,
So slowly moved about,
As we had lent her half our powers
To eke her living out.
—Hood.
HOW TO PARSE CONJUNCTIONS.
304. In parsing conjunctions, tell—
(1) To what class and subclass they belong.