sat 语法 改错
问题描述：
sat 语法 改错
Tornadoes form when large air masses of different temperatures (collide,which results from either a change in )the direction or the speed of the wind.
括号中应改成（collide as the result of a change in either）原句错在哪里?
答
either 修饰 the direction or the speed 也就是或者是方向或者是速度上有了改变
而不是修饰 a change ,共同的部分要放在either前面
所以either要放在 change的后面