In standard English, NOT may modify the quantifier though the NOT occurs elsewhere in the sentence. This is especially the case when the NOT occurs with the copula. If you want to clearly state that the NOT modifies what follows the copula, use the complement of the predicate or NON.
| ENGLISH SENTENCE | STANDARDIZED TRANSLATION |
| All students are not logical |
Some students are not logical (That is, not all students are logical.) |
| All students are illogical | No students are logical |
| All students are nonbirds | No students are birds |