4.2. Change the given sentence into the following tenses. Virtual libraries present a new paradigm for learning in school libraries.
a) Simple past tense
b) Past perfect tense
c) Present continuous tense
d) Simple future tense
e) Past progressive tense

virtual libraries presented a new paradigm for learning in school libraries.

virtual library had presented a new paradigm for learning in school libraries.

virtual libraries are presenting a new paradigm for learning in school libraries.

virtual libraries will present a new paradigm for learning in school libraries.

virtual libraries were presenting a new paradigm for learning in school libraries.