ENGLISH
REFERENCE

as of

prep. phr..
C1 Advanced Oxford

prep. phr.. you use this to show the exact time or date when a new rule or situation starts.

prep. phr.. a prepositional phrase used to indicate the specific time or date from which a state or condition begins to apply.


SIMPLE

As of tomorrow, the office will be closed.

CONTEXTUAL

As of next month, all employees are required to use the new security badges for entry.

COMPLEX

As of the first of January, the revised environmental regulations will be strictly enforced across all manufacturing sectors to ensure compliance with international standards.

Usage

usually followed by a specific date, time, or event; common in formal announcements and business contexts.

Teaching tip

contrast with 'since' which looks back from the present to a past start point; 'as of' can point to the past, present, or future to mark a boundary.

Pitfall

As of now on, we are ready.As of now, we are ready.do not combine 'as of' with 'from now on'; use 'as of now' to mean starting at this moment.

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