It has been used as the symbol... is correct here. Use Present Perfect when the action referred to started in the past, and either continues (or continues to have relevance) at the time of speaking.

Jan 8, 2015 · What is the difference between "I used to" and "I'm used to" and when to use each of them? Here, I have read the following example: I used to do something: "I used to drink green tea." "I …

Jun 13, 2019 · What is the negative form of "I used to be"? I often hear "I didn't used to be" but that sounds awfully wrong in my ears.

Apr 18, 2017 · Here is a question that has been nagging me for a few years: Which is the right usage: "Didn't used to" or "didn't use to?" Examples: We lived on the coast for years but we didn't use to go …

Oct 27, 2015 · I am trying to find out if this question is correct. Did Wang Bo used to be awkward? Should I write "use to be" instead of "used to be," or is "used to be" correct in this sentence?

Feb 14, 2024 · I am trying to explain to an ESL student how to understand when to treat "some" as plural and when to treat it as singular. One clear rule is when "some" is the subject followed...

Apr 12, 2011 · Bryan Garner, Garner's Modern American Usage, fourth edition (2016) provides what I take to be the current (and traditional) formal prescriptivist view among U.S. usage authorities of …

Nov 8, 2010 · The animals were frequently used as a model organism in the 19th and 20th centuries, resulting in the epithet "guinea pig" for a test subject, but have since been largely replaced by other …

There's so many people in here! There's so much people here! Which one should be used, and why?

Jan 7, 2012 · 0 Mr. is most typically used with either the man's last name alone, or last name and selected other parts of the name. But that is for polite society. In everyday use, it is often appended …