Time
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Reduction of Time clauses with After, Before, While, When and Since
These seem to occur a lot in descriptive writing found in academic, newspaper, and magazine registers. The basic rule is to remove the subject and change the verb to the –ing participle. View complete summary.
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Less than 24 hours after she entered a rehab facility, superstar Britney Spears abruptly checked out.
Less than 24 hours after entering a rehab facility, superstar Britney Spears abruptly checked out. (Reduced)
Frequency