英语高手进What do you suppose has happened to him?

英语高手进What do you suppose has happened to him? What do you suppose has happened to him? what do you suppose _______to him?为什么是has happened不是to happe Do you know what was happened to him. (3)jane hasnot come yet what do you suppose have happened to what has happened to you do you know what happened with him ?/to him? with 还是to? Do you know __________? A.what happened to him? B.what the m Do you know___?A.What happened to him :B.What is the matter what happened to him? 17.-- What do you suppose made him look so unhappy? what do you think had happened to him. 这句话在语法上怎么用句