"Let not thine eyes be blind", my son.

I think it is imperative because it is just an advice to her son to take care of himself.

  • 3
    What do you think?
    – BillJ
    Commented Feb 13, 2021 at 14:03
  • I think it's ambiguous, in that it could be either "imperative" (speaker is urging the boy not to close his eyes to whatever is going on), OR "invocative" ("praying" to God that He will metaphorically open the boy's eyes). But I don't see any way for it to be "causative". Commented Feb 13, 2021 at 15:00
  • It's called an 'optative', a minor clause type that expresses wishes. Though it's a main clause, the plain form verb "be" marks it as a subjunctive construction.
    – BillJ
    Commented Feb 13, 2021 at 16:35


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