When do I use is or does when I ask a question? For example, Is your item still for sale? Does your item still for sale? I am not sure which one to use.

Sep 15, 2014 · tl; dr - It's exclusive if the situation described is notable by its absence. It's likely to be inclusive if the situation described is notable by its presence. At its heart, until describes …

Dec 26, 2020 · ‘When does the pharmacy open?’: Asks at what time the pharmacy goes from being closed to being open. ‘open’ in this case is a verb, referring to the act of becoming …

How it works is a phrasal noun. How does it work? is an interrogative sentence (question). The former is commonly used as a heading and there is no question mark at the end.

Does $\sum\frac {\sin n} {n}$ converge? I have tried the comparison test, root test and ratio test but still can't prove it is convergent or divergent.

Feb 8, 2014 · In the set of real numbers, there is no negative zero. However, can you please verify if and why this is so? Is zero inherently "neutral"?

Oct 19, 2012 · $\pi$ Pi Pi is an infinite, nonrepeating $ ($ sic $)$ decimal - meaning that every possible number combination exists somewhere in pi. Converted into ASCII text, somewhere …

Nov 6, 2018 · The answer in both instances is 'have'. It is ungrammatical to use 'has' in questions that begin with 'Do' or 'Does'. In these types of questions the verb 'do' is conjugated based on …

Mar 5, 2011 · What does := mean? Ask Question Asked 14 years, 7 months ago Modified 5 years, 4 months ago

Nov 25, 2014 · Which is more appropriate to say? Where does Yuji buy the guitar? or Where did Yuji buy the guitar?