When I see the envelope from school in the mail 中为什么用see 而不用过去式

Each time I cried when I see the film. like when I see I see .when you know the last love. When I see you,the sky is bule是什么意思 A:when did you see Jack?B:I saw him when I ( ) off the train (get) I ___________ (see) the film “Chicken Run”.--- Where and when ________ you _______ (see) it?-- See you when I see you I see many people when I’m on the bus.对 “when I’m on the bus.”划线提问 when can I see you When I See U 歌词 When I cross the street,I see two boys____ there空里填什么When I cross the street,I see two boys____ there空里填什吗跪求！！！ I happened ____(see) the accident when i was walking past the park. I ______(tell) him the good news when I see him at the office. I always get nervous when I see the envelope _____ school _____ the mail. it is so big,that i cannot see the border,when i stay in the middle. when i see you,the pain fill my heart.i think .i will never be happy. when i was waling on the road,i happend to /happening to see him yesterday I see a lot of people when I am on the trina是什么意思?