First, to become a good language learner, we should should be very clear to the understanding of the phrasing.The next in order, the distich son should acquaint with.To the single phrase too is.
Similar in principle to the enclosing of parenthetic expressions between commas is the setting off by commas of phrases or dependent clauses preceding or following the main clause of a sentence.
Its main function is formbuilding and distincting ,and it can be the phrase tail of noun,adjective,verb,numeral etc. , constitute some new phrase languages or give the phrase language the new meaning.
In our efforts to adjust differences of opinion we should be free from intolerance of position,and our judgements should be unmoved by alluring phrases and unvexed by selfish interests.
The recursiveness of phrase structure rules:These rules can generate an indefinite number of sentences,and sentences with infinite length,due to their recursive properties.