If I had known that my friend has planned.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
NakoolShouldn't we use 'If I had known' in place of 'If I knew'?I think both "If I knew..." and "If I had known..." are correct in that situation. I think when we're dealing with verbs, such as 'know' or 'have' (in the sense of 'possess something'), we could use either "If + past perfect" OR "If + past simple".
NakoolIf I knew that my friend had planned to visit the town today, I would have made his stay comfortable.It's OK, but not quite sensible time-wise. There is discord between "today" and the past time frame.