Some people find it difficult to drink the recommended amount of water each day.This may be because they dislike the taste of water,or they just forget to get up periodically and fill their glass.其中：Some people find it difficult to drink the recommended amount of water each day.是不是应该是：Some people find it is difficult to drink the recommended amount of water each day.为什么呢?
问题描述：
Some people find it difficult to drink the recommended amount of water each day.This may be because they dislike the taste of water,or they just forget to get up periodically and fill their glass.
其中：Some people find it difficult to drink the recommended amount of water each day.
是不是应该是：Some people find it is difficult to drink the recommended amount of water each day.
为什么呢?
答
两者都对；有 is 的时候it 是形式主语,没有is 时it是形式宾语.意思不变.