Incorrect: Both did not come.
Correct: Neither came.Incorrect: Both of them did not pass the test.
Correct: Neither of them passed the test.In negative clauses, we use ‘neither’ not both.
Incorrect: Both did not come.
Correct: Neither came.Incorrect: Both of them did not pass the test.
Correct: Neither of them passed the test.In negative clauses, we use ‘neither’ not both.