Present Continuous
Present Simple
Present Perfect Continuous
Present Perfect
Past Simple
Past Perfect
Past Perfect Continuous
Future Simple
Future Continuous
Future Perfect
Future Perfect Continuous
Have been discovered?
Submitted by Mark on Tue, 10/23/2007 - 14:11.
The answer to your question
Hello dhayun and welcome to the forums!
The example that you gave is a present perfect sentence.
"have been discovered" sentence (like in "America has been discovered by Columbus") is passive. I have a feeling this might have led you to confusion about the two tenses.
If we were to rewrite the sentence, it would be: "Columbus has discovered America". Of course, we should use the Past Simple here ("Columbus discovered America") - because this discovery was made at a definite time. For more information you can see pages devoted to the present tenses.
Returning to your question, we can also see that your sentence is not in the present perfect continuous because there is no -ing form.
I hope my answer was useful!
In which category 'have been discovered fall in? I am confused with 'have been + past participle' and 'have been + verb+ing' . Can someone explain to me, please?