Collocations, Idioms and Phrasal Verbs IN CONTEXT

Collocations
A collocation (also collocate) is a word or phrase which is frequently used with another word or phrase, in a way that sounds correct to speakers of the language. For example, heavy rain

Idioms
An expression whose meaning is different from the meaning of the individual words. For example, to have your feet on the ground is an idiom meaning to be sensible.

Phrasal verbs
A combination of words that is used like a verb and consists of a verb and an adverb or preposition, for example give in or come up with
Any long English text, spoken or written, will contain many examples of the three. Often, intermediate students who cannot go beyond intermediate level struggle to deal with how dense a language can become once we have learned the simple grammatical structures and have mastered a large set of vocabulary.


Source:one stop english.com