20.If it were not for this faculty，they would devour all the food available in short time and would probably starve themselves out of existence.
(虚拟语气)
如果不是具有这种能力，它们就会在短时间内吞掉所有能得到的食物，而且很可能会因饿死而灭绝。
分句1. If it were not for this faculty
分句2. they would devour all the food available in short time
分句3. would probably starve themselves out of existence
分句1 是虚拟句的条件从句
分句2、3是并列， 主句
版权声明：本文系网独家稿件，版权为网所有。转载须注明来源及作者，否则必将追究法律责任。
微信扫描下方二维码，第一时间知晓托福考试真题预测及解析，还有北美留学最新动态喔~(微信号：toefl120)!