Hi
Are these both OK?
Sometimes it's not wise to look back into the past.
Sometimes it's not wise to look back on the past.
Thanks,
Tom
Mr. Tom both OK? The second one is suspect.
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Mr. Tomboth OK?
The second one is suspect. That is, it sounds wrong to me.
But if you take a look at this Ngram, you'll see how much I know about it.