In his research paper, Dr. Frosh, medical director of the Payne Whitney Clinic, distinguishes mood swings, which may be violent without their being grounded in mental disease, from genuine manic-depressive psychosis.
语法 Sentence Correction-1386
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正确的用户笔记
lxn129 2015-08-30 17:12:29
distinguish用两种用法。一是大家熟悉的distinguish...from...；二是口语中比较少见distinguish between...and...。（朗文现代英语第五版中特别注明了在日常口语中，一般用tell the difference between sb/sth，但也正说明在书面语言中第二种用法是正确的） 开始排除： A.their being grounded明显错误；
ypheroin 2016-03-06 20:33:42
without their being grounded in mental disease 是错误的，their being 多余。
