i don't know can i finish it when i go to school 语法对吗

i don't know can i finish it when i go to school 语法对吗 - —— does it take her to go to school - I don‘t know I don't know when I'll finish when it left scars can heal~i don't know~ i don't know when to do it.为啥要加it?而 when to go后则不需加别的啥呢? I don't know when to leave I don't know whether to go to school nor (to) go to the park i don't think i can go to school by myself because I am not I don't know where it is 和 I don't know where he can go 中 wh I don't know when I can post this letter . can\"t I go to sleep,when I don\"t feel tired? can\"t I go to sleep ,when I don\"t feel tired