没有问题. You 主语 will find谓语 studying English is interesting and helpful.整句话是省略了that的宾语从句,做find的宾语. studying English动名词做主语 is 谓语 interesting and helpful 表语. 你会发现学习英语很有趣并且有帮助.
有错。正确的应该是:You will find studying English interesting and helpful.句式是:find sth.+adj.或者You will find that studying English is interesting and helpful.宾语从句find that (that不可省略)