【正确答案】Language transfer refers to the fact that in learning a second language，learners will subconsciously use their native language knowledge．Language transfer can be positive or negative．Presumably，positive transfer occurs when a first language pattern is identical with，or similar to，a target language Pattern，for example，“I speak Chinese．”Negative transfer occurs when the first language pattern is different from that of the target language．For example，Chinese students frequently produce sentences like“Although…but…”and“He come tomorrow．”because the grarmmatical structure of the two languages are different here．