1. In the workflow
2. On the workflow
3. In the web portal
4. On the web portal
Are all these phrases grammatically correct?
Yes, they are. The grammar is: a preposition is followed by a noun phrase, its complement. Those are all grammatical prepositional phrases.
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Yes, they are. The grammar is: a preposition is followed by a noun phrase, its complement. Those are all grammatical prepositional phrases.
If they make sense in a sentence, that is a different question. It depends on the sentence.