The past tense of know is knew. The -ed participle is known. I knew that she had recently graduated from law school. I should have known that something was seriously wrong. Be Careful!Don't use a progressive for
1. To assume control, management, or responsibility: I'm taking over while the supervisor is on vacation. 2. To assume the control or management of or the responsibility for: She took over the job after he left. 3. To become dominant: Our defense took over in the second half of the ...