英语中有几大从句,分别是什么,并且是什么意思。希望讲解通俗易懂,谢谢...答:It seems that the performance is very useful. 2)what引导的主语从句表示“...的东西时”,一般不用it作形式主语。 What we lack is experience. 3)what,who,when,why,whether等词含有各自的疑问意义,但它们引导的主语从句,都用陈述语序。 How the plan is to be carried out should be discussed again. ...