How I'm having to work, in the following sentence, is different from I have to work?
The course is more demanding than I expected and I'm having to work harder than I ever have before.
How I'm having to work, in the following sentence, is different from I have to work?
The course is more demanding than I expected and I'm having to work harder than I ever have before.
The difference between "have to" and "having to" is the same as between the Present Simple and the Present Continuous.
Consider these examples:
However, "have to" with the latter sentence will be correct too.
Here, in the sentence, I am having to work means the person is required to work; while I have to work means the person is working, but he's not expected to work (at least, that's not implied).
This is what I inferred from the question. I am not completely sure of its accuracy.
The use of the "having to do" form may be appropriate when the speaker intends to draw attention to the limited duration of the obligation, for example:
My roommate broke his collarbone the other day, so I'm having to help him dress and undress, to water his flowers, make his bed, and do a few more things for him before he recovers.
At the same time, since the "have to do" form is nearly always correct, using it would really be the safest choice for learners in any context, in my opinion.