Question

It is old enough for the boy to go to school. 这句英语的语法哪有错？？

Answer 1

It is old enough for the boy to go to school. 这句英语的语法哪有错？？
错在逻辑。
本句中的it是形式主语，真正的主语是不定式复合结构for the boy to go to school. 这是一件事情，相当于名词性从句：the boy goes to school 这件事情。它与表语old (enough)不搭配。
你不可以说：That the boy goes to school is old enough.
应改为：The boy is old enough to go to school. 这男孩年纪足够大，可以上学了。

Answer 2

翻译

it is too old for the boy to go to school

it is young enough for the boy to go to school

Answer 3

把“for the boy”改成“of the boy”
或者改成The boy is old enough to go to school.

Answer 4

nowhere