一、解析
首先对 jump off the wall 划线提问是 What must you do now？然后句意是：你现在必须做什么？
二、具体分析如下
首先原句划线内容去掉，然后确定特殊疑问词，画什么问什么.，画的是动词所以问的是做什么即What，最后剩下部分一般疑问句改，有情态动词must，沐舒坦提前即可即可，所以划线提问是What must you do now？然后句意是：你现在必须做什么？
三、划线提问具体思路如下
第一步，划线提问划线内容去掉，
第二步，确定特殊疑问词画什么问什么，画的是动词短语问的是做什么，即 What。
第三步，剩下部分当一般疑问句改，即这里面有情态动词must，即must提前，剩下的照抄，What must you do now？然后句意是：你现在必须做什么？
四，特殊疑问词的确定
1、划线部分是“事或物”，特殊疑问词用 what
如: This is a book. ---What is this?
I often play football on Saturdays . ---What do you often do on Saturdays ?
2、划线部分是“人”，特殊疑问词用who
如: He is my brother. ---Who is he ?
3、划线部分是“地点”，特殊疑问词用where
如: The box is on the desk. ---Where is the box ?
4、划线部分是“时间”，特殊疑问词用what time或when
如: It is seven twenty . ---What time is it ?
I usually get up at six . --- When do you usually get up ?
5、划线部分是“年龄”，特殊疑问词用how old
如: I am twelve . ---How old are you?
My father is thirty-three . ---How old is your father ?
6、划线部分是“职业”，特殊疑问词用what
如: Mike is a worker. --- What is Mike ?
7、划线部分是“颜色”，特殊疑问词用what colour
如: My hat is blue . ---What colour is your hat ？
8、划线部分是“数量”，特殊疑问词用how many或how much
如:I can see five kites . ---How many kites can you see ?
There is some milk in the glass. ---How much milk is there in the glass ?
9、划线部分是“多少钱”，特殊疑问词用how much
如: This pen is nine yuan . ---How much is this pen ？
以下口诀要牢记：
问“谁”用who；．问“地点哪里”，用where；
问“年龄”，用how old；问“多少”，用how many；
问价钱”用how much；问“什么”，用what；
问“职业”，用what；问“颜色”，用what colour；
问几点用What’s the time?或 What time is it ?
五、拓展训练
1. That car is yellow. (提示:问颜色) _____ _____ is that car?
2. My sister is 15 years old. (提示:问年龄) ______ _____ is your sister?
3. Tom likes monkeys.(提示:问”谁”) ______ ______ monkeys?
4. I have eleven books in my bag.(提示: 问数量) ______ ______ books ______ ________ in your bag?
5. She wants some eggs.(提示:问”什么”) _______ _______ she ______?
① What colour ② How old ③ Who likes
④ How many ； are there ⑤ What does ； want
以上就是关于划线提问知识点，感谢您的阅读，如有帮助请采纳哟。
望采纳，谢谢