Question

she hid herself so that she might not be seen (use:lest)

Answer 1

she hid herself lest she might not be seen.

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Answer 2

She hid herself lest she was seen.

EXPLANATION:  

A conjunction is a joining word. It is used to join two phrases or clauses or sentences. It is a function word that is used to act like glue and stick to sentences together. Conjunctions are very important in any language as they signify a lot of things like a similar relation between two things, or a condition where if one option exists then the other doesn’t.

Lest here is a conjunction used to denote something that shouldn’t happen, it is the wish to stop something from happening like the subject here doesn’t want to be seen. Thus lest is used in this statement.