Reduced Adverbial Clauses: While Working, If Necessary, and Given the Evidence

Reduction is elegant only when the omitted material is easy to recover.

While working in Almaty, she developed the course is clear because the understood subject of working is she. While working in Almaty, the course was developed is defective unless the course itself somehow had a job.

Time and reason often reduce to participle phrases

After reviewing the data, we revised the model. / Having reviewed the data, we revised the model. The second version makes the earlier completion more explicit.

Condition can reduce more radically

If necessary, contact the editor. / Where possible, use primary evidence. / Given the evidence, a cautious conclusion is preferable. These compact forms are common in professional and academic prose.

Because this topic overlaps with clause compression, review participle clauses and reduced relative clauses. The key difference is function: here the reduced unit modifies the whole clause by expressing time, reason, condition, or concession.

Safety check: restore the full clause in your head. If the hidden subject changes, or the logical relation is unclear, do not reduce it.