from when I last saw him
since I last saw him
before I last saw him
No correction required
Answer is Right!
Answer is Wrong!
The correct answer is D. No correction required.
The sentence “He may have aged when I last saw him” is grammatically correct. The word “when” is used to indicate a specific point in time, and the word “may” is used to express possibility. Therefore, the sentence can be interpreted as meaning that it is possible that the person has aged since the speaker last saw him.
The other options are not grammatically correct. The word “from” is used to indicate a starting point, and the word “since” is used to indicate a period of time that has elapsed. The word “before” is used to indicate a point in time that came before another point in time. Therefore, none of these words make sense in the context of the sentence.