同学你好，该知识点来自沪江网校《英语零基础直达大学六级【特惠班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好~
for a long time多用于肯定句，但并不代表不能用于否定句和疑问句。
用于否定句时，和long的含义不同。

He didn't speak for long. 他没说很久。
He didn't speak for a long time. 他很长时间没讲话了。

I haven't been here long. 我来这儿没多久。
I haven't been here for a long time. 我很久没来这儿了。

didn't want to make 不想拍电影，这里make表示“制作，拍摄”
didn't want to make another film for a long time 很长时间都不想再拍电影了

祝同学学习进步~