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
Use No decision yet.
Avoid No 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.
Use No decision yet.
Avoid No decision as of yet.