as yet / yet
Whether as adds anything to yet.
Prefer yet. As yet is not wrong, but as is usually idle. Use as yet only when you want a slightly formal delay: no decision as yet.
Examples
UseNo decision yet.
AvoidNo decision as of yet.
Whether as adds anything to yet.
Prefer yet. As yet is not wrong, but as is usually idle. Use as yet only when you want a slightly formal delay: no decision as yet.
UseNo decision yet.
AvoidNo decision as of yet.