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Hi teachers

I wonder if #2 and #4 are grammatical.


1. It was during the night that I met him (I think it's grammatical)

2. It was during the night when I met him. ( ?)

3. It was in the park that I met him. ( I think it's grammatical)

4. It was in the park where I met him (?)


As always, many thanks native teachers.

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#1 and #3 are OK. I personally don't like #2 and #4 in the interpretation that I believe you intend (i.e. as an elaborated way of saying "I met him during the night" or "I met him in the park"). Opinions may vary.

+1
Michelle Cha Regarding it-cleft

Always use 'that' (or optionally 'who' for people). After the beginning with It is/was and a highlighted item, our brains are searching for that. Those with 'when' or 'where' can sound incomplete.

It was during the night when I met him that the earthquake struck.
It was in the park where I met him that I found the money.

CJ