Question : Select the most appropriate option to substitute the bracketed segment in the given sentence. If there is no need to substitute it, select 'no substitution required'.
I assisted him to undo the (task after I finished my work).
Option 1: task after I will finish my work
Option 2: no substitution required
Option 3: task after I will have finished my work
Option 4: task after I had finished my work
Correct Answer: task after I had finished my work
Solution : The fourth option is the correct choice.
The correct form should be after I had finished my work to maintain the proper past perfect tense. In English, when expressing actions in the past that occurred in a specific order, past perfect tense is used for the action that happened first.
Therefore, the correct sentence should be: "I assisted him to undo the task after I had finished my work. "
