Comparing with dictionary, concordancers and colloaction retrieval system offers us more different words that go with the word we searched in a natural environment(In other words, they are not made to fulfill the purpose as the examples in dictionaries). NTNU Concordancer and Collocation Retrieval System even lists the frequency of the collocations so that we are able to learn the mostly used collocations and the ones that are not used often (which suggests us to avoide use such collocations ).
The weakness of CCRS is that the context that comes along with the search result is restricted, therefore makes it difficult to identify the meaning or the appropriate usage of the collocations.
I did not encounter any problem when using CCRS. However I wonder if the tool updates its databank continuously or else we shall not able to learn the new collocations from it.
Right, without enough contextual clues, generate rules or meanings of the words could be very difficult. As to if they update the corpus, well, i think the answer is no.
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