we should use "i didn't know"
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.
"Knew" is the past tense of "know." In the present tense, you would use "know" instead. For example: "I know the answer."
I knew you could do it!The court wanted to know what the defendant knew, and how long he had known it.
They made the weapons that they had. Of course they knew how to use them!!!!
the egyptians had nothing else to use. most likely they didnt even know or call it science.
Hydrogen bombs. And there is hydrogen in something we like to call H2O or water if you didnt know that.
My Knowledge has no rememberance it didnt let me use I dont know
Charles Babbage of course because he was the one who invented it. If he didnt use it first how would he know it worked? this answer is the use of common sense
i dont know but we use technology now that they didnt in the old days
yes because they didnt know how to fight in the war
yes because they didnt know how to fight in the war
yes because they didnt know how to fight in the war