Sometimes I notice the preposition on after some words (verbs) like cheat, advise etc. When I see the preposition after the words (verbs) I always think "can we avoid it after the words?".
1a -> He cheated on me.
1b -> He cheated me.
2a -> I advise them on what to do.
2b -> I advise them what to do.
Can I rewrite them without the preposition? And if yes, do they work in the same way?
In the second example. I think the preposition worked fine as the speaker was talking about a topic. And on the topic she advises. But in the first one the preposition seems unnecessary. I meant to say it could be written without the preposition. But I am not sure if it works in the same way.