The past tense of 'Know' is Knew.
The past tense of "pat" is "patted."
Pat I pat the dog.
The past tense is patted.
Was, or has been.
laughed
Raced
Past tense you mean? =Taught
Was, or have been. I am becomes I was, or I have been.
they are both correct it just depends on what tense the sentence is in. if the sentence is in pat tense it is may be required, but if it is in present tense it is may require. they are both correct it just depends on what tense the sentence is in. if the sentence is in pat tense it is may be required, but if it is in present tense it is may require.
The past tense of know is knew, and the future tense is will know.
Know is present tense. Exmpl: I know that the word "know" is present tense The past tense of "Know" is "Knew" Exmpl: I knew that the word "knew" was past tense.
The future tense of "know" is "will know."