题目

He put his books on the desk last night.(改为否定句)He ______ ______ his books on the desk last night. 答案：【答案】didn’t put 【解析】句意：昨晚他把书放在书桌上。昨晚他没有把书放在书桌上。要求把原句改为否定句。put为实意动词，由last night可知句子时态为一般过去时，改为否定句需要加否定助动词didn’t，同时过去式put要变为动词原形put；故答案为(1). didn’t (2). put。  Only in this way, _______succeed in solving the problem.   A.you can    B. can you    C. you would  D. could you