如果是系动词Be, 改成问句时,直接把BE动词提前.如果是特殊疑问句,be动词应该在疑问词后面.
例如： He is at home now. Where is he?
She is good at maths. What is she good at?
如果是行为动词的话,改问句时就得加个助动词.助动词也是在疑问词后面.
例如： He likes the place very much. What does he like very much?
He does his homework at school. Where does he do his homework?
He went to school by bus yesterday. How did he go to school yesterday?
注意：不同的时态中,助动词会根据时态变形哦. 但是行为动词总是原形的.