"not to mentioned"

[KSSEEJ]

"To train a doctor locally takes at least seven years and costs millions of dollars, not to mentioned some of them will shift to private health care sectors for better income"

Is the phrase "not to mentioned" rightly used? Could anyone give me some advice?

[emsr2d2]

"To train a doctor locally takes at least seven years and costs millions of dollars, not to mentioned some of them will shift to private health care sectors for better income"

Is the phrase "not to mentioned" rightly used? Could anyone give me some advice?

No, it's not correct. It should read "not to mention", no matter what tense the rest of the piece is in, that's a stock phrase.

I'm hungry, not to mention absolutely parched.
He was short and stocky, not to mention muscle-bound.
I really have my work cut out taking seven exams in eight days, not to mention the twelve assignments I have to hand in the same week.

[BobK]

... and I'd be happier with a 'that' before the last clause. (I'm inclined to think it's just wrong without, but in speech there's usually intonation that says 'here comes a subordinate clause' - so some teachers might defend it.)

b