A phrasal verb is a verb with two parts; the verb and a preposition. The preposition changes the meaning of the verb - to turn on a light is different from to turn a corner.
Why are phrasal verbs difficult to learn?Phrasal verbs can cause problems for English language learners because there are no universal rules. They can also seem illogical: you arrive at school but in a town etc.
Another problem is that English has more phrasal verbs than other languages - simply because it has more words. Many verbs have multiple phrasal variations. Set, for example, has 464 entries in the Oxford English dictionary.
So it's impossible to learn them?No, but you won't do it in an afternoon! The best approach is to try learn two or three key phrasal verbs a day and then commit them to long term-memory by repeated practice.
Where do I start?Memorising phrasal verbs is most effective when it naturally arises from your reading or study. If you come across look up for example you should first try and guess the meaning from the context. Then you can look up the meaning in the dictionary. Then practise using look up in your speech and writing so that you don't have to look up the meaning again.
These resources will also help teach and/or learn phrasal verbs:
English Language Teaching Pack (only £1.99)