It's also possible for an ongoing present situation of limited duration: My wife is away this week, so I'm having to pour my own beer.
I don't think it is an ongoing present situation of limited duration."you have taken this job so now you are having to do this work in time".
The non-progressive form is nearly always correct, and is the safest choice for learners.
I think it is not the progressive form but a participle modifying 'question'.Tufguy asked a question having to do with the progressive form illustrated in this sentence.
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