Which one of the following sentences is correct:
"How Internet helps you?"
"How does Internet help you?"
Is it always mandatory to use "do" in how-questions?
Learn English – “How Internet helps you?” vs “How does Internet help you?”
definite-articledo-supportgrammatical-numberquestions
Best Answer
OP's example Internet (without the definite article) is a distracting non-standard usage. See “I don't have internet” vs. “I don't have the internet” as previously asked on ELU for further discussion of this).
So to focus on the specific aspect of usage being asked about here (using "do" to frame a question), let's change it to...
Notice that in my amended version, I've removed the question mark from #1. That's because it's not a question. It's not even a sentence - it's just a noun phrase. We can see this by considering...
As to whether it's necessary to include do in questions, consider this answer to the earlier ELL question “How it works?” vs. “How does it work?”. Effectively it's not, since these are all valid questions...
That's to say, the interrogative (how, in this case) must be followed by an auxiliary verb, but there are many others besides to do that can perform this function in questions.