It is +adj+-ving的语法现象?

It is +adj+-ving的语法现象? It is +adj+-ving和It is +adj+to do sth可以互换吗? it is+adj+从句 it is hard to+Ving还是to do sth Why is the girl crying so sadlyi think it adj to do sth 是什么语法 语法书中哪里找 have been+v原,过分,adj,ving的情况和详解 It is +adj for to do 的用法和例句 It is +adj+that的从句用法对了还要例句 it is + adj.的比较级+to do sth. 有 It is adj+to sb的形式么? It is+adj.+to+sb.+to do sth. 和 “It is + adj.+for +sb.+to do sth.”的区别 It is + adj + of sb.+ to do与It is +adj +for sb.+to do的区别.说详细一点, My uncle is a scientist.He is always busy with _research_ work这里的research为什么是adj?不是这里面有个短语是be busy with 加n或Ving吗?急 find it's +adj for sb to do sth在语法上是不是错的啊 英语语法填空一小题 it is fun（ ）with child填play的适当形式 解释下it is adj for（of） sb to do sth 但这句子摘自语法书 是playing... it's+adj.+of +sb.it's +adj.+for sb.这两句的用法it is adj.of sb.和is adj.for sb.这两句如何理解含义和用法. find it adj那么think it +adj 什么 want make have所有实义动词都可以加形式主语或形式宾语再+adj?还有think it is adj 这里的it不是形式宾语吗?为什么是is adj 而think it adj 又是什么.好纠结 It is + adj + that 是什么句型?