it was not until--------------that/when 的区别如题

问题描述:

it was not until--------------that/when 的区别
如题

not...until直到...才.
1.用when 表示时间,比如
It is not until 4 years old when he could talk.
他直到4岁才会说话.
2.that后边跟一个句子,it就指的是整个句子
见到了后你把that从句跟it替换,意思就很明显了