How did this topic come____?
I am having doubt in - from and here...
Answers
Actually both of them are not correct. But you can say
How did this topic come here.
or
Where did this topic come from
Answer:
Both are correct.
Reason —
The two Indefinite Articles a and an are used when referring to single person or object, not being a particular person or object.
A:
used before a noun to refer to a single thing or person that has not been mentioned before, especially when you are not referring to a particular thing or person[1]
(An has the same meaning but it is used before words beginning with vowel sounds.)
Therefore, a means one.
Secondly, one is an Adjective of Number that answers the question how many.
How many doubts?
One doubt.
Hence, it is correct to say one doubt, two doubts, a few doubts in sentences … (more)
Footnotes
Doubt is a feeling of uncertainty.
Grammatically, both are correct.
However, among the two ‘I have a doubt’ is more accurate since doubt itself is singular and very well aware that there is only a single doubt.
In this case, the person is confused about something which the person (present in front of them) could answer. Thus, these doubts are usually questions.
But, the best phrases are ‘I doubt it/I doubt that/ etc.’ Followed by the doubt lingering in your head because you are emphasizing the uncertainty which the person isn’t aware about too.
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I have one doubt / I have a doubt.
Both the above sentences are grammatically correct because……
both “a/an” and “one” mean one. The difference is that “one” puts more emphasis on the number such as — I have three computers and only one printer.
So when you say “I have one doubt” or “I have a doubt”, it means the same, with the only difference that “one” is emphatic compared to “a”.