In my native language, the translation of the following a- and b-variants has the same meaning.
Tell me please whether they have difference in English or not.
britannica.com:
(1a) Many English words are derived from French.
(2a) The river derives its name from a Native American tribe.
vocabulary.com:
(3a) The present name derives from an older form.
my variants:
(1b) Many English words were derived from French.
(2b) The river derived its name from a Native American tribe.
(3b) The present name derived from an older form.
Is there any difference between the a- and b-variants?