2017年6月英语四级语法从句：主语从句

英语自学网

　　1、主语从句可直接位于主语的位置，如果从句较长，谓语又较短，可用it作形式主语，而将从句放在句末。常见的句型有：
        　　It is a facta pitya questiongood news that...
        　　It seemsappearshappenedhas turned out that...
        　　It is clearimportantlikelypossible that...
        　　It is said eportedestimatedhas been proved that...
        　　It is said that comic books create a connection between people of the same
generation.
        　　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.
        　　I did know why I felt like crying.