mybook is( ） 括号里填found find finding 说出原因

mybook is( ） 括号里填found find finding 说出原因 to find、to be found、finding、being found的区别 He helped me __(found,find,finding) my book. what is the ( )(可能)time to find him in his office括号里填单词 i am ( )a book under the tree 括号里填finding还是reading? 修改下面病句,并说出错误原因（写在括号里） 1=()+()+()+()+()括号里填不同的分数.说出方法. l'm__class three,grade one.(横线里填什么并说出原因） can you find ( ) ( he him his ）括号里填什么 （ ）（ ）is the vase?括号里填什么? First name is（）name ,括号里填什么? Is （） in the water括号里填动词