高中英语：强调句型只能是It is/was而不能是It were?

高中英语：强调句型只能是It is/was而不能是It were? 定语从句与强调句型it is yesterday＿ i called you.为什么不能填when,而只能是that构成强调句型.yesterday不是也有名词词性吗? 寻找一首歌,开头歌词是wa wa way,it is a wa wa way. it is the third time that you have been late this month是强调句型吗 是戴维把球踢进去的（用强调句型It is...that） it is not until...that是强调句吗那它是什么句型呢 It is the house that I want to look for.是强调句型还是定语从句? It is just that I find science really difficult 什么句型呢?不清楚!是表语从句还是强调句型! 高中英语强调句型及定语从句改错题：Another fact I should mention is my love for dogs,which is that drives me to apply for the job.答案给的是将that改为what,但是我认为可以将which和 is之间加上it,形成强调句式, 强调句型有it is ...when 强调句型有it is ...when it is ...where it is ...who 这3种句型吗? 用It is…that造句,强调句型 高中英语的强调句型是怎么回事啊 It is obvious that he tries his best.是强调句吗 是强调句吗it is ....that....强调句型是不是把it is that去掉以后也能形成句子？ it is that句型it is that只是强调句吗?他还可不可以是别的句型?在什么时候that可以省去? it is that的强调句型对于强调句很陌生,给几个例子, 关于It is.that 的强调句请问一下it is that 强调句型这个句型可以用于强调表语吗? It is three years ago that I began to learn English是强调句型还是时间状语从句?为什么? 提问给好评.How clever you are.是强调句?为什么没用It is …that句型?