两个定语从句的问题1.This is the boy without _____help I couldn't have

英语句子改错定语从句1.This is the longest train which I have ever seen 定语从句的问题 例：This is the factory _that_ I visited yesterday.tha this is the boy.i sit behind him怎么合并成定语从句? 请教定语从句的两个问题 1. Is this museum ______ you visited a few days 将下列两句话用定语从句的形式合成一句话 This is the boy The boys father is our t 定语从句的问题第一个句子：This is the factory ___his father works.第二个句子：T this is the first time that i have come here;是定语从句的话,它的先行词什么 This is the reason I have to go.这是一句定语从句,那么他的引导词是 定语从句下列各句中均有益处错误,指出来并加以改正1.This is the best film which I have 定语从句改错：This is the most difficult maths problem which I have 把下列句子合并为含有that引导的定语从句的复合句.1.This is the best movie.I have se 请帮我看看这些句子有错吗?1.without your help i couldn't have finish the