when____by,I saw them playing basketball on the playground这里的横线上应该填passing还是passed

when____by,I saw them playing basketball on the playground这里的横线上应该填passing还是passed i saw a saw ,and sawed the I saw the man saw with his saw.的中文 I saw a saw,and sawed the saw I saw saw saw I Saw The Man 歌词 I loved you the moment I saw this is the man_____last nightAwhom I saw him Bwho I saw Cwhich I saw Dwho I saw him I saw the movie three times.提问 i saw him ____(walk)into the I saw [你]in the bookstore yesterday I saw him__into the small store. I saw him in the street是什么意思 I saw him go 什么 the classroom I saw you working in the I Saw You Walking In The Rain I saw she was watering the flowers i saw a cake on the table.