此句Farmers are producing harvests twice as large as before中的twice as large as before

此句Farmers are producing harvests twice as large as before中的twice as large as before

题目
此句Farmers are producing harvests twice as large as before中的twice as large as before
是harvests 的定语从句吗?
答案
不是.如果后面跟的是which或引出的which/that are twice as large as before,那就是从句.要记住,既然是从句,句中就需有主语和谓语.twice as large as before中两者皆缺,可算作定语从句中省略了主谓语之后的形容词短语,功用相同.
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