be thought to 的结构用法尽量详细

be thought to 的结构用法尽量详细 be going to do结构的用法 be thought of to用法be thought of为什么后面要加to 一道英语选择题_be thought to be的用法____more than 3000 languages in the world.A.There are thought to beB.There is thought to beC.They are thought to beD.It is thought to beThere is thought to be和It is thought to be这两种说法是否 be thought to be 和be thought of as的区别请详细点,包括后面加名词动词的用法 be doing结构的用法 be to的用法, be thought to Be thought to be going to 结构的用法 全一点,要他的句式构成 be used to 的用法? be able to 的用法 be able to的用法 be able to的用法 be able to 的用法 be supposed to的用法 be good to的用法 be to do 的用法.