1.表疑问的宾语从句其实就是“引导词(疑问词) + 陈述句”结构.
楼主需要使用逆转思维,不用把它看成是疑问句,而只是一个简单的陈述句即可,再在其前加上相应的疑问词.
2.如:Where did you go last week?变成宾语从句时,你想一下如果是被划线提问的陈述句时什么结构,当然是:I/You went to + 某处 + last week.
它加上疑问词where就是所谓的宾语从句结构.
再如:He went there last week.
如果对last week提问,即是:When did he go there?
但是变成宾语从句时需要还原为when he went there,如:I don't know when he went there.
3.当然,What's the matter是特殊情况,其变成宾语从句时,句序不用改变,还是what's the matter.
这种情况不多见,楼主死记就可以了.