Answers

2014-06-10T16:39:25+08:00
Any set of words can be a phrase, for example: too expensive, ride a bicycle, after the lunch. Linguists define phrases as a group of words that are a single unit in a hierarchical structure, for example in a sentence. 

Sentence is also a group of words, but they have to be linked together grammatically. Fore example: I like this dress very much, but it is too expensive. Every weekend I'm riding a bicycle. After the lunch we went to the cinema.
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2014-06-10T17:41:17+08:00
We go to church every monday

PHRASE :
 was crying
i saw him
pass by
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