我妹要写英语造句：If从句,目的状语从句,时间状语从句,If条件从句我妹读初二,最好是第十单元的内容最好写长点

简单句I am going to school
If从句I don't know if you are a student
目的状语从句I study hard in order to have a good mark
时间状语从句when i was reading the book,my mother came in
If条件从句If it doesn't rain tomorrow,we'll go to the zoo