not to mention
fixed phr..fixed phr.. you use this to add more information that supports your point, usually something even more important or obvious than what you just said.
fixed phr.. a discourse marker used to introduce an additional fact or point that reinforces the previous statement, often implying that the new point is even more significant.
The hotel was dirty, not to mention very expensive.
The hike was exhausting due to the steep climb, not to mention the heavy rain that started halfway through.
The project suffered from a lack of clear leadership and poor communication, not to mention the fact that the initial budget was entirely unrealistic.
usually follows a comma and introduces a noun phrase or a clause starting with 'the fact that'.
explain that this phrase functions like 'plus' or 'as well as' but carries more rhetorical weight, often used to 'pile on' negative or positive points for emphasis.
not to mentioning the pricenot to mention the pricethe phrase is fixed with the infinitive 'mention' and does not change to a gerund.