19 The form is the perfect tense with the vav (ו) consecutive. It carries forward the tone of instruction initiated by the command to “go … and get” in the preceding verse.
20 The form is the perfect with the vav (ו) consecutive; it carries the future nuance of the preceding verbs of instruction, but by switching the subject to Jacob, indicates the expected result of the subterfuge.
21 Heb “so that.” The conjunction indicates purpose or result.

In other versions

And you shall bring it to your father to eat, so that he may bless you before he dies.”

Then take it to your father to eat, so that he may give you his blessing before he dies.”

Then take it to your father to eat so that he may bless you before he dies.”

Then take the food to your father so he can eat it and bless you before he dies.”

Then you must take it to your father and he will eat it so that he may bless you before his death.”

And thou shalt bring it to thy father, that he may eat, and that he may bless thee before his death.

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