What will I do tomorrow?

[Alice Chu]

Please tell me if the following statements are correct.
https://www.usingenglish.com/teachers/articles/ways-expressing-future-in-english.html
Ways of Expressing the Future in English

4. the modal will + bare infinitive
d. instant decision:
What will I do tomorrow? I know! I’ll go to the zoo. (The speaker decides to go to the zoo at the very moment of speaking – no plans had been made for this visit.)

6. BE + to + infinitive
This form is not common in informal conversation. It refers to something that is to happen in the future as a plan or decree, normally by some authority other than the subject of the sentence, and is common in television and radio news reports Thus we are unlikely to hear the first of the following examples (unless Emma and Luke are the names of well-known singers, actors, etc) . We might well hear the second:
Emma is to see Luke tomorrow.

 

[Charlie Bernstein]

They're both correct.

 

[5jj]

Is there anything that led you to believe they might not be correct, Alice?

 

[PaulMatthews]

You have it right. Syntactically, the modal auxiliary verb "will" has two tenses: present and preterite.

Semantically, it is used to make reference to future time (about 80% of its occurrences, I believe) but also for expressing volition (as in I keep telling my son to get his hair cut, but he won't; so I've told him he has to --- notice, the refusals to get his hair cut are in the PAST, and this sentence actually entails that there IS a haircut in his future!).

The film will be seen at the Sundance festival is syntactically a present tense clause with "will" as the tensed verb. But in that example, "will" clearly expressed reference to future time --- something that could be done in various other ways as well (The film is going to be seen at the Sundance festival; The film is about to be seen at the Sundance festival," etc.).

 

[5jj]

Semantically, it is used to make reference to future time (about 80% of its occurrences, I believe)

Where did you find this figure of 80%?

but also for expressing volition (as in I keep telling my son to get his hair cut, but he won't; so I've told him he has to --- notice, the refusals to get his hair cut are in the PAST, and this sentence actually entails that there IS a haircut in his future!).

Surely the refusals began in the past and are ongoing. I see no indication in those words of a future haircut.