Science, asked by mdzubairkhan4724, 6 days ago

Before that they didn't know-----

Answers

Answered by vvmane315

Answer:

The only grammatically correct sentence is the first "I didn't know about that before", although personally I would use "I didn't know about that previously". If you want to use past perfect, then you must say "I hadn't known about that previously".

Explanation:

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Before that they didn't know-----​

Answers

Before that they didn't know-----