You may have heard the argument "it's not can I go to the bathroom, it's may I." If this is true, then any question such as "can you get me a glass of water?" could have the same argument applied to ...
Is there any difference between these two sentences? Which one is grammatical in speech? I will do my best. I will do my level best.
The Cambridge Grammar of the English Language says this: Echo what is syntactically very different from the interrogative pronoun what. It can replace words of more or less any category, and can ...