视情况而定：1 如果后面动词与前面的动词用and,or,but 等连词连接,一般需要改动,除非是固定句型.如：We visited the museum and went to the phe fark.
2 如果没有连词,那就有可能是to do/ doing/do.如：He wanted to see the film.He kept asking questions.He help do some housework.
如果前面是did,1 did是助动词,则后面动词用原形,如：Where did you go just now?
3 如果是行为动词,则与1、2种情况一样