Answer:
If you heard someone say "blue sky the is," the language system that would account for the problem is syntax.
Step-by-step explanation:
A syntax problem is a problem related to the way we process linguistics, when a person has a syntax problem it is difficult for them to identify the roles and functions of the different parts of speech, the words collocations and how the meaning of the words can be totally different depending on the order they present in the sentence. Sometimes, it also presents problems with phonemes and spoken utterances.