Like I mentioned before they are like vocabulary words, so you need to use them as such in your writing and in your speaking.
I also mentioned before that they are not formal words. You might find some in business and more formal conversations, but most of them are informal or semi formal. This means you can use them in any conversation with your friends, family and colleagues. If you are doing some official writing, academic writing, talk or writing to your boss you’ll have to be more careful and most likely avoid using them at all.
Don’t worry too much, they are not like slang and it will not upset anyone if you use phrasal verbs, just be a bit more careful with your vocabulary in formal situations. Anyway, normally you would already be more careful about what you say in those situations.
So, for now enjoy the course and I hope you’ll learn a lot and will really use the phrasal verbs.
And as always if you have any questions or comments, just post them below or send me a message.