The phrasal verb 'tear up' is separable because you can say 'She tore the letter up' or 'She tore up the letter'.
* tearup是可以分开的短语动词，因为既可以说Shetoretheletter up ，又可以说 She tore up the letter。
Structural analogy analogizes non-verb-object structure into a verb-object structure, when the original non-verb word group was set forth as the separable word.
结构类推一般将非动宾结构类推成动宾结构，这时原本非动宾结构的字组就被类推成离合二字组了。
Structural analogy analogizes non-verb-object structure into a verb-object structure, when the original non-verb word group was set forth as the separable word.
结构类推一般将非动宾结构类推成动宾结构，这时原本非动宾结构的字组就被类推成离合二字组了。
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