[Grammar] Presenst Perfect with 'since'

nadine_nc said:

Am I wrong?

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Nightmare85 said:

It depends on the situation.

Look:
Example 1: - no "since when"
Let's say you work in a factory.
I come to you and ask you:
"How long have you been working here?"
The question is fully okay and fully neutral.

Example 2:
2 days later I see you in another factory.
This confuses me, and I ask you:
"Since when do you work here??"

Example 3: - no "since when"
You ask your teacher:
"How long have you been a teacher?"
This would be correct.

Example 4:
You discuss with a friend about cars.
Your little sister (imagine it) begins to speak with you about cars.
You and your friend laugh and ask here:
"Since when do you have any knowledge about cars?"

Do you see?
There is a clear difference between Example 1+3 and 2+4
This "since when" is more a question when something is unexpected.
Do never use "since when" when it's a neutral question.

P.S. Not a teacher ;-)

Cheers!

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jayan12 said:

You discuss with a friend about cars. \\incorrect
You discuss cars with a friend \\ correct

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Nightmare85 said:

I can't agree with you, bhaisahab.
In my opinion example 2 and 4 are the same.
The question is not about the time (how long), it is more like
"What's the reason that you work here, now??"
I don't really care how long she's been working here.
Since when do pigs fly? ;-)

Cheers!

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Nightmare85 said:

Originally Posted by jayan12
You discuss with a friend about cars. \\incorrect
You discuss cars with a friend \\ correct

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Nope, both are correct.
https://www.usingenglish.com/forum/ask-teacher/112295-easy-sentence-you.html#post549889

Cheers!

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nadine_nc said:

Are there any verbs that cannot be used in the present perfect tense with 'since'?
We've had a discussion about whether or not a sentence like 'Since when has the new school year started?' is grammatically correct.
I think it is. Am I wrong?

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