A phrasal verb is a verb usually followed by a preposition. The difference between an ordinary verb followed by a preposition (eg look at a word) and a phrasal verb (eg look up a word) is that the meaning of the former can be easily understood once you know the meaning of the base verb (in our case it is the meaning of the verb look), whereas the meaning of a phrasal verb oftentimes has nothing...
What is a phrasal verb?
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