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Lucas21c Posted 11 years ago
Grammar

Since

Could you tell me which one is right among the following sentences?

1. Since when have you known him?
2. When did you know him?
3. How long have you know him?

In case of #3, are both of "I have known him since 2010" and "I have know him for 5 years" okay as an answer?
  

Top answer

The more common expression would be: How long have you known him? Your answer should be a reflection of this (known not know) I have known him [since 2010/for 5 years]. Know is present tense and you are reporting on a past event (beginning in the past).

— Doctor D

  • The more common expression would be: How long have you known him?
  • Your answer should be a reflection of this (known not know) I have known him [since 2010/for 5 years].
  • Know is present tense and you are reporting on a past event (beginning in the past).
  • I know that man--he's a thief!
  • (You are identifying him in the present).
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3 Answers
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The more common expression would be:
How long have you known him?
Your answer should be a reflection of this (known not know)
I have known him [since 2010/for 5 years].

Know is present tense and you are reporting on a past event (beginning in the past).

I know that man--he's a thief! (You are identifying him in the present).
I knew that man--he was
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Sorry, it's my mistake. 'have know' is just a typo. It should have been 'How long have you known him?' in my first post. Except that, then, are all of 1~3 okay?
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lucas21cCould you tell me which one is right among the following sentences?
1. Since when have you known him?
2. When did you know him?
3. How long have you known him?
In case of #3, are both of "I have known him since 2010" and "I have known him for 5 years" okay as an answer?
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