CONJUNCTIONS. As apparently for "as if"As, like "an" (102), appears to be (though it is not) used by Shakespeare for as if. As above (102), the "if" is implied in the subjunctive.
i.e. "in the way in which (he would throw it away) were it a careless trifle." Often the subjunctive is not represented by any inflection:
“To throw away the dearest thing he owed
As 'twere a careless trifle.
; Rich. III. iii. 5. 63. Sometimes the as is not followed by a finite verb:
“One cried, 'God bless us,' and 'Amen' the other,
As they had seen me with these hangman's hands.
“As gentle and as jocund as (if I were going) to jest,
Go I to fight.