1. I will hold the door open for you.

2. I will keep the door open for you.
3. I will stay the door open for you.

3. You should hold healthy.
4. You should keep healthy.
5. You should stay healthy.
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Could the verbs, hold, keep, stay be used in the same sentences as in the above? Which are not acceptable? Do they communicate the same meaning?

1, 2, 4, and 5 are all fine.

3 and 3 are incorrect.