下面这句摘自高中英语新教程人教版必学一 p5：
Her first impression was that English was difficult and people spoketoo quickly, but soon she found that if she concentrates on the ideas, not thesingle words, she could understand!
请问句子中的 that if 引导的是什么从句啊？
Her first impression was that English was difficult and people spoketoo quickly, but soon she found that ifshe concentrates on the ideas, not the single words, she could understand!
句中的 that 引导宾语从句，if引导条件状语从句。
按理说，if引导的条件状语从句应该放在句末的，但在本句中被移到了宾语从句中间。原句也可写成：
Her first impression was that Englishwas difficult and people spoke too quickly, but soon she found that she could understand if she concentrates on the ideas, not thesingle words!
类似的例句如：
I knew that if I made any sound, theywould find me. 我了解我一发出声音，他们就会发现我。
He said that if we started at dawn, wewould be there by noon. 他说，大家如果黎明出发，中午就能到。
这种在高考考试题中常常出现的，所以需要重视：
I tell my mom that if we’re forced toeat things, we may become ill. 我告诉我母亲，假如大家被迫吃东西，大家或许会生病的。
He said that if he quit the job, hewould lose his drive to work and succeed. 他说假如离职，就会失去工作和成功的动力。
Her mother told her that if she didsomething to change the problem that made her sad, she wouldn’t feel as bad. 她的妈妈告诉她，假如她做一些事情去改变这个令她难过的问题，她就不会感觉那样糟糕了。
