the difficulty is that by the time children reach school age, there are so many other influences that it is almost impossible to tell whether girls are worse at science and maths.请分析一下句子.主句是哪个?that it is almost impossible to tell whether girls are worse at science and maths这个句子是什么从句?我真的是搞不懂了!
the difficulty is that by the time children reach school age, there are so many other influences that it is almost impossible to tell whether girls are worse at science and maths.
请分析一下句子.主句是哪个?that it is almost impossible to tell whether girls are worse at science and maths这个句子是什么从句?我真的是搞不懂了!
主句是the difficulty is that，
that是表语从句关联词，that后面部分都是that引导的表语从句，
that it is almost impossible to tell whether girls are worse at science and maths是so...that...句型的后半部分，属于结果状语从句，句意是：有那么多影响因素以至于很难判断女孩儿在数学和自然科学上是否有劣势
主句：the difficulty is that
that 后面是从句
从句里面by the time...作状语
有there be句型 和so...that...
so...that...太。。。以致。。。
在到达上学年龄之前，有太多其他因素以致几乎不可能说清女孩是否在科学和数学方面更差。
主句是It is almost impossible to tell whether girls are worse at science and maths
分析:so that (it is almost impossible to tell whether girls are worse at science and maths) 表示因果关系的从句
be impossible to tell( whether girls are worse at science and maths )状语从句
这个句子的成分比较复杂
the difficulty is that by the time (when) children reach school age.这里when与by the time 是同一个意思
稍微理解了一些了吗