For Tenses look at:
https://www.englishclub.com/grammar/tense.htm
For Passive Voice look at:
https://www.englishclub.com/grammar/passive-voice.htm
Active Voice is basically the "normal" voice, everything that is not Passive.
Language is rather broad but here it probably means:
https://www.englishclub.com/vocabulary/
Help with certain aspects
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