助动词后面要加动词原形吗比如说：i didn't know

助动词后面要加动词原形吗比如说：i didn't know 助动词后面加动词原形一定加动词原形吗 如have Do you think everyone enjoy their weekends?do是助动词后面要加动词原形,think已经为原形了,那enjoy还要为动词原形吗?为什么? have后面像其他助动词一样后面加动词原形吗 like后面要加动词原形吗 not后面要加动词原形吗? Do you know what our new music teacher looks like?这句话look为什么要加s?助动词后面的动词不是跟动词原形吗? was 后面动词要加ing吗还是动词原形 如果一个句子里既有does（do）又有like那后面的动词要不要加ing,还是原形?比如说：比如说：I don't like . 情态动词和助动词后面加的动词是不是都是原形? doesn’t后面为什么加动词原形,我们老师讲的是好像助动词后加? help 后面是不是要加动词原形? please后面为什么要加动词原形 should 后面必须加动词原形吗, should 后面必须加动词原形吗, often 后面加动词原形吗 have to后面加动词原形吗? should 后面必须加动词原形吗,