He thought Daniel was discussing the project with his classm

He didn't think Daniel was discussing the project with his classmates
再问： he（）（）Daniel（）（）the project with his classmates
再答： 四个空分别填didn't think ，was discussing
再问： did和was能出现在一个句子里吗
再答： 他不认为Daniel正与他的同学们讨论项目。He thought 变成否定为He didn't think ，与后面的was doing在时态上并不影响。