[Grammar] As tired as she was, I decided not to disturb her

[SW LEE]

I have just read that after an adjective, adverb or noun 'as' can mean 'although', and suggest an emphatic contrast.
ex) (As) cold as it was, we went out. (in American English, as ... as is common.)

And I also read that occasionally 'as' can be used in this structure to mean 'because'.
ex) Tired as she was, I decided not to disturb her.

Then is this sentence grammatically correct ? : As tired as she was, I decided not to disturb her. (mean 'because')


Many thanks.

 

[tedmc]

The first 'as' is not required.

The subject in the second part should be 'she', not 'I'.

Not a teacher

 

[MikeNewYork]

"Because she was so tired, I decided not to disturb her."