The Wikitionary article on tenebrous includes a sentence usage. http://en.wiktionary.org/wiki/tenebrous
dignify
Could you please be more specific.
There are many sentences which you could construct to illustrate the meaning of the word many.
To construct a sentence with the term "acknowledged mail," you could say, "After sending the important documents, I received acknowledged mail confirming their receipt." This sentence effectively incorporates the term while conveying the action of sending and receiving confirmation.
Could you please certify that?
" Go get me that projector, please".
to where?
Could you please provide the third sentence you are referring to?
Yes. "Could you please switch the light on?" "I left the television on"
Could you please pass the butter? Bill could not catch the chicken, but Bob could.
Could you please provide the sentence you would like me to check for proper spelling?
Could you please provide the sentence with the bolded verb form?