known
e.g. If I had known it would be very cold here, I wouldn't have booked this holiday in Iceland!
There is no past participle of knowing.Knowing is the present participle of know. The past participle of know is known
Had known is the past participle.
The past participle is known.
The past participle of drinking is drunk. The past participle of know is known.
The past participle is known.
The past participle of "know" is "known."
The simple past of know is knew and the past participle of know is known.
The past participle is known.
The past tense of "know" is "knew", and the past participle is "known".
The simple past tense is knew. The past participle is known.
Known is the past participle of know know / knows = present tense knew = past tense known = past participle knowing = present participle
Known is already the past participle of know.