[amp_mcq option1=”don’t know” option2=”know” option3=”knew” option4=”have known” correct=”option1″]
The correct answer is: A. don’t know
The other options are:
- B. know: This is incorrect because the sentence is in the negative, so the verb should also be in the negative.
- C. knew: This is incorrect because the sentence is in the present tense, so the verb should also be in the present tense.
- D. have known: This is incorrect because the sentence is about a general lack of knowledge, not a specific event in the past.
The sentence “I don’t know this man at all” means that the speaker has never met the man before and does not know anything about him. The speaker is not saying that they used to know the man but have forgotten him, or that they have met the man but do not remember him. They are simply saying that they have never met the man and do not know anything about him.