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I have been using “starting suspecting” frequently thinking that it’s correct too but recently my friend corrected me. I don't understand why.
It is well-known that start to + verb and start verb-ing are interchangeable in terms of meaning:
- It started to rain.
- It started raining.
The sentences above mean the same thing.
There is also no problem with the verb suspect being used as a gerund-participle:
- I started suspecting something was amiss.
There is no problem with using the verb start in continuous cobstructions:
- It was starting to rain.
So what's the grammatical problem with the folowing?
- I was starting suspecting that something was amiss.