Re: on which / when and comma
Yoong Liat wrote:He came on Friday, when it was raining hard.
He came on Friday, on which it was raining hard.
1. Is the comma necessary? I don't think so.
No.
Quote:2. Should I use 'when' or 'on which'? I'd use 'when'.
You need to:
1. Know what you want to say!
2. Get tenses right.
Do you mean:
It was raining as he arrived, i.e. "He came on Friday, and it was raining at the actual time that he arrived at the door, his umbrella was up, his shoes were all wet, etc etc,"? Then use --
when it
was raining hard. (pay attention to tense - was raining - past progressive)
-- Or --
It rained the same day as he arrived? Then use "He came on Friday, that day on (or upon) which it rained hard, time not specified." -- on which it
rained (simple past)
Yoong Liat, do you own any English grammar books? Have you studied the different past tenses? I suggest you refresh your knowledge, and I venture to advise you that repeatedly asking questions on this forum is NO SUBSTITUTE for doing your own learning and study.