Hi;
did they fail:tick: → “nor” is marginal coordinator→we have inversion
they failed:cross: → because of two reasons:1. lexical verb can never appear in the sructure of a “code” ,we need auxiliary.
2.after “nor” we have inversion
Nor is a contraction of "and+not+either" think of it in these terms and the answer becomes obvious. You don't use a negative after it because then you would have double negation and it would be out of sync with the first phrase which is a negative sentence. In order to have appropriate parallelism we must choose the second answer as the first answer is incorrect as it does not have the necessary participle.
I'm sorry , mayby first one's is correct because second and third are like question did they? this is my opinion, just remember and translate to your language.:roll:
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