1. It is raining since morning.
2. It has been raining since morning.
Is there any chance that we can say sentence 1 is NOT completely wrong?
If sentence 1 is not grammatically correct, can sentence 1 be used in informal speaking instead of sentence 2? If sentence 1 is used, what will you, as a professional English teacher give me upon 10 (only for this use)?
Sentence 1. is pretty much ungrammatical; however, if we assume ellipsis and add in a pause or some punctuation, it would definitely work:
- It is raining--(and it has been) since morning.