关于 n times more likely than这个点，求大神指教！

wei46

之前做题遇到一次，今天模考又遇到一次，犯了同样的错误，不是很懂。
就是  4 times more likely than... (这是题干)， 答案选的是  4 times as likely as ...  ,
别的点暂且不说， 之前学的是， n times more than = n+1 times ，那这里 原题干意思不是应该是5 倍吗？而答案这个表示方法不是4倍吗？
之前有一道题也是这样，所以我觉得肯定是有个点我没弄清楚，求大神指教！！！！

AHOLA

According to a survey of graduating medical students conducted by the Association of American Medical Colleges, minority graduates are nearly four times more likely than are other graduates in planning to practice in socioeconomically deprived areas.
A minority graduates are nearly four times more likely than are other graduates in planning to practice  
B minority graduates are nearly four times more likely than other graduates who plan on practicing  
C minority graduates are nearly four times as likely as other graduates to plan on practicing  
D it is nearly four times more likely that minority graduates rather than other graduates will plan to practice  
E it is nearly four times as likely for minority graduates than other graduates to plan to practice  
你说的应该是这道题吧
我觉得这道题先把语义放在一边，但看语法问题
A. 主系表结构的比较中，如果是主语比较，系动词要省略；be likely in doing用法错误，应为be likely to do…。
B. who plan on practicing变成定语从句修饰graduates，使得be likely to结构不完整。比较的是 minority graduates和other graduates 在XXX areas 而B选项显然是拿minority graduates与在XXareas的graduates 做对比。
C. 正确。four times as likely as…和four times more likely than…都是可以的，且含义相同。Be likely to do...使用正确，plan on doing…使用正确。
D. 这里是强调句型；It is likely that…句型可以用(OG 10-237)；more…than比较句型不完整，合适的结构应该是it is X times more likely that A will happen than that B will happen，不过更合适的是'A is X times more likely to happen than is B.。
E. four times as…than…比较结构错误。

AHOLA

当然还有说法是times后面不能加more than，因为会造成歧义，这个我也不是很理解，还是首选times as ...as的形式吧，求大神指导~！