GMAT语法是令很多同学头疼的科目，新东方网GMAT频道在此和大家分享北京新东方周谢慧老师带来的GMAT精讲精练班语法笔记，希望对大家复习有所帮助。
Practice1-5
5. That twenty-one ceramic dog figurines were discovered during the excavating of a 1,000-year-old Hohokam village in Tempe, Arizona, has nearly doubled the number of these artifacts known to exist.
A.That twenty-one ceramic dog figurines were discovered during the excavating
B.Twenty-one ceramic dog figurines discovered at the excavation
C.Discovering twenty-one ceramic dog figurines at the excavating
D.Ceramic dog figurines, twenty-one of which were discovered during excavating
E.The discovery of twenty-one ceramic dog figurines during the excavation
在需要使用名词的时候，优先使用动作名词(Action Noun)，其次使用动名词(GERUND)
double vt, 使…翻一番
A double B A使B翻一番
double vi, 翻一番
A double A翻一番
double adj., 两倍的
A is double B A是B的两倍
以上是GMAT精讲精练班语法笔记。
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