CNN:
《The history and future of ice cream》
A form of sorbet had become a popular dessert in Europe by the later 1600s.
and Americans dating back to George Washington enjoyed the cool confection.
1)上句应该用late，即by the late 1600s 吗？
2) Americans 是 dating back 的逻辑主语吗？ 这里的dating back是动名词还是目前分词呢？ 怎么分辨的？
3) George Washington enjoyed 是不是应该为George Washington who enjoyed ?
1 是的，later 应为 late。
2 Americans主语 （dating back to George Washington） enjoyed 谓语动词 the cool confection宾语.
剩下的你一个人剖析。注意句子表达的逻辑！！！！！！！！！！！！！！
