None of them seem natural to me. Perhaps:
Although he is very strong, he can't lift it.

Student or Learner
The (as) adjective + as + subject + be pattern confuses me sometimes. Are the pairs below correct and equivalent in meaning?
1a Strong as he is, he can't lift it.
1b He can't lift it despite his strength.
2a Strong as he is, he can lift it.
2b He can lift it due to his strength.
3a Strong as he is, no one can beat him.
3b No one can beat him because of his strength.
4a Strong as he is, he should train every day.
4b No matter how strong he is, he should train every day.
(All examples are mine.)
Not a teacher or native speaker
None of them seem natural to me. Perhaps:
Although he is very strong, he can't lift it.
Not a professional teacher
All right, here's my view on this:
1a and 1b are fine. Yes, they're equivalent in meaning.
2a and 3a are not good. The (as) adjective + as + subject + be pattern is used primarily when the following clause is contrastive, as it is in 1a. For that reason, they don't work.
4a ought to be Strong though he is ...
Jutfrank is smarter than me,
But we don't always agree.
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Not a professional teacher
As smart as she is, she is also funny.
That means the same thing as:
She is very smart, and she is also very funny.
(Note that jutfrank used the word primarily.)
The other one makes no sense to me.
Not a professional teacher
NOT A TEACHER
Alexey, here is what one of my favorite grammar books says: "Sick as he is, he will want to go with you" is a shorter way to say "Though he be sick as he is, he will want to go with you."
Source: House and Harman, Descriptive English Grammar (1931, 1950), page 415.
Last edited by emsr2d2; 16-Oct-2020 at 14:56.
The second one says Bill is as strong as John.
Not a professional teacher