Have known is correct.
The correct phrasing should be, "I didn't know that." The past tense of "know" is "knew," so using "knew" in this context would be incorrect.
No. "I could have gone with you if I had known your schedule." Or "If I had known your schedule, I could have gone with you." Your verb tenses are incorrect in the original, and you need to use "if" to set up the condition.
Could be "know, knows" but also the simpler "knew, knew" or even the perfect tense "had known, knew" -- the tense is so undefined that you would have to choose from a number of distractors.
it stays the same knew!(**
The simple past of know is knew. I was sure I knew how to get to the museum.The past participle is known. I have known Mary for ten years.
That is the correct spelling of the phrase "I knew that" -- synonyms for known are understood, comprehended, and recognized.
Compare these sentences using know / knows, knew and known: CORRECT: Present tense: I know the answer. I knew the answer. They know the answer. Past tense: He / She knows the answer. He / She knew the answer. They knew the answer. Known requires a helping verb, a form of 'be' in had or have. Correct: I had known the right answer. He / she had known the right answer. They should have known the answer. Though I should have easily known the answer, I did not know what I knew.
No, the correct phrase is "he knew winter was coming." The word "had" is unnecessary in this sentence.
I knew you would love it
She knew the correct answer was 5, but she didn't care.
The correct phrasing should be, "I didn't know that." The past tense of "know" is "knew," so using "knew" in this context would be incorrect.
No. "I could have gone with you if I had known your schedule." Or "If I had known your schedule, I could have gone with you." Your verb tenses are incorrect in the original, and you need to use "if" to set up the condition.
It Must Be "I Knew About This Long Ago".
Could be "know, knows" but also the simpler "knew, knew" or even the perfect tense "had known, knew" -- the tense is so undefined that you would have to choose from a number of distractors.
It's not completely correct. Since the sentence is referring to the past, the correct way to say it is "I knew that the plane would crash." And all sentences have to start with a capital letter.
it stays the same knew!(**
The simple past of know is knew. I was sure I knew how to get to the museum.The past participle is known. I have known Mary for ten years.