"They have to wake up early in the morning."
I do not understand the meaning of the sentence above. Does it express the general/habitual obligation or future obligation? Could you discuss general and future obligations, please. I am confused.
1. Please see here for future obligations the last part "> warning:" http://dictionary.cambridge.org/grammar/british-grammar/have-got-to-and-have-to
2. Please see here for general obligations the first part "have/has to" http://www.grammarbank.com/must-have-has-to.html
I think the two sites just used different words for the same thing. The context will tell you if it is a general or future (specific) obligation. ).
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I think the two sites just used different words for the same thing.
The context will tell you if it is a general or future (specific) obligation. Notice the two underlined sentences are exactly the same (The one you posted.).
But #1 is a specific future obligation, and #2 is a general habitual obligation.
1. They have a flight at 7 am tomorrow. They have to be at the air