john isn't a diligent student,for it is the third time he has been late,__?为什么填isn't it
问题描述：
john isn't a diligent student,for it is the third time he has been late,__?
为什么填isn't it
答
前面主句不是写的john isn't a....么，和主句保持一致。不要管for 引导的那个从句，那个是原因壮语从句。
答
isn't it意思是“难道不是这样吗”？
要是填is it?就变成“是这样吗”？不合文意
答
isn't it中的it指代for之后的内容，for之后的句子为肯定句，附加疑问句就要用否定。若是要指代for之前的内容，则需用isn't he
答
因为想要得到肯定的回答。比如说“她很漂亮，不是吗？”
答
for 是并列连词,中文意思是“因为”,连接并列句,与 because,since,as 引导原因状语从句不同.但这还不是此题目的根本原因.此题考查反意疑问句,空格部分要与全句的后半部分保持一致,即it is the third time he has bee...