英语~~~感谢、I saw him in the street yesterday.否定句：疑问句：划线提问：（第一个划

I didn't see him in the street yesterday.
Did I see him in the street yesterday?
Who saw him in the street yesterday?
Who did I see in the street yesterday?
无情态动词（即can,shall,should,must等）或无系动词（即is,are,am）的句子如果要改成否定句,就要加个助动词（即do,does,did）,然后在助动词后加not

否定句：I didn't see him in the street yesterday.
疑问句：Did I see him in the street?
划线提问：（第一个划在I）
Who saw him in the street yesterday?
划线提问：（第二个划在him)
whom I saw in the street yesterday?