He is writing a letter in his study. （否定）

He is writing a letter in his study. （否定） look he is （writing） a letter to his Tony is writing a letter in his room.(对writing a letter提问） her,writing,grandma,the,study,is,a,in,letter(.) writing,grandma,the,study,is,a,in,letter(.) He is writing a letter He is writing a letter.（对a letter提问） He is writing a letter with a pen.和He wrote the letter in pe 1.He writing a letter in the room.(改错） 2.There is an orange He is writing a letter to his mother on the paper对to his mot writing grandpa the study is a in letter 怎么组成句子? writing,grandma,the,study,is,a,in,letter(.)连词成句