您可以说：
A: "What do you have planned after school today?"
B: "I have to go to the pbrary and finish my project before it's due tomorrow."
或者：
A: "What are you going to do after school today?"
B: "I'm going to go to the park and play basketball with my friends."
或者：
A: "What are you going to do when you get home from school today?"
B: "I'm going to start studying for my math test tomorrow."
放学前是指在放学时间到来之前，因此您可以使用上述对话来描述这个时间段。希望这些对话能够帮助您。